IMPACT 500 - BTD 900c dongle at a glance
Last modified: Tuesday, 29 September 2026
The dongle BTD 900c is included in the IMPACT 500 MS UC ANC WL USB-C+A bundle. It is also available as an accessory.
The dongle BTD 900c is included in the IMPACT 500 MS UC ANC WL USB-C+A bundle. It is also available as an accessory.
Series
IMPACT Series
Articles
- IMPACT 1000 - Accepting a call
- IMPACT 1000 - Adjusting and wearing the headset
- IMPACT 1000 - Adjusting the headset’s microphone volume for softphones
- IMPACT 1000 - Adjusting the Sidetone
- IMPACT 1000 - Audio Limiter
- IMPACT 1000 - Battery removal and replacement guide
- IMPACT 1000 - CH 40 charging stand
- IMPACT 1000 - Changing audio settings
- IMPACT 1000 - Changing the volume
- IMPACT 1000 - Charging
- IMPACT 1000 - Cleaning the product
- IMPACT 1000 - Clearing the pairing list
- IMPACT 1000 - Clearing the pairing list of the dongle
- IMPACT 1000 - Connecting the dongle
- IMPACT 1000 - Connecting via USB and charging the battery
- IMPACT 1000 - Connection possibilities
- IMPACT 1000 - Ending a call
- IMPACT 1000 - Headset at a glance
- IMPACT 1000 - Headset buttons at a glance
- IMPACT 1000 - How to update firmware
- IMPACT 1000 - Installing EPOS Connect
- IMPACT 1000 - Leaving the Bluetooth range
- IMPACT 1000 - LEDs at a glance
- IMPACT 1000 - Listening to media
- IMPACT 1000 - Making calls
- IMPACT 1000 - Managing multiple calls
- IMPACT 1000 - Muting the microphone
- IMPACT 1000 - Package contents
- IMPACT 1000 - Pairing with a mobile device
- IMPACT 1000 - Pairing with Bluetooth devices
- IMPACT 1000 - Pairing with the dongle
- IMPACT 1000 - Pairing with the dongle
- IMPACT 1000 - Reconnecting/Disconnecting the dongle
- IMPACT 1000 - Rejecting a call
- IMPACT 1000 - Replacing the ear pads
- IMPACT 1000 - Resetting the headset
- IMPACT 1000 - Switching the headset off
- IMPACT 1000 - Switching the headset on
- IMPACT 1000 - Transporting and storing
- IMPACT 1000 - Using Active Noise Cancellation
- IMPACT 1000 - Using Microsoft Teams and Cortana
- IMPACT 1000 - Using TalkThrough
- IMPACT 1000 - Using the Smart Pause functions
- IMPACT 1000 - Using the voice assistant
- IMPACT 1000 - Verifying battery power
- IMPACT 1000 - Voice prompts
- IMPACT 1000 Video - How to update the headset
- IMPACT 1000 Video - How to adjust the ANC and TalkThrough
- IMPACT 1000 Video - How to adjust your headset
- IMPACT 1000 Video - How to charge the headset
- IMPACT 1000 Video - How to connect the headset
- IMPACT 1000 Video - How to control calls on the headset
- IMPACT 1000 Video - How to control media on the headset
- IMPACT 1000 Video - How to control multiple calls at once on the headset
- IMPACT 1000 Video - How to control volume on the headset
- IMPACT 1000 Video - How to factory reset the headset
- IMPACT 1000 Video - How to mute the microphone on the headset
- IMPACT 1000 Video - How to power the headset on / off
- IMPACT 1000 Video - How to use Microsoft Teams with the headset
- IMPACT 1000 Video - Package contents
- IMPACT 400 - Activating / deactivating the sensor functions
- IMPACT 400 - Adjusting the headset's microphone volume for softphones
- IMPACT 400 - Adjusting the Sidetone
- IMPACT 400 - Changing the volume
- IMPACT 400 - Changing Windows audio settings
- IMPACT 400 - Enabling / disabling an Audio Limiter
- IMPACT 400 - Headset buttons and LEDs
- IMPACT 400 - How to connect
- IMPACT 400 - How to wear the headset
- IMPACT 400 - Making calls using the headset
- IMPACT 400 - Managing multiple calls
- IMPACT 400 - Muting the headset's microphone
- IMPACT 400 - Updating the firmware
- IMPACT 400 ANC - Using Active Noise Cancellation (ANC)
- IMPACT 400 Video - How to control calls
- IMPACT 400 Video - How to control the volume
- IMPACT 400 Video - How to replace the leatherette earpads
- IMPACT 400 Video - How to update the headset
- IMPACT 400 Video - How to use Microsoft Teams functionalities
- IMPACT 400 Video - Package contents
- IMPACT 430T / 460T - Using Microsoft Teams
- IMPACT 500 - Adjusting and wearing the headset
- IMPACT 500 - Adjusting the headset's microphone volume for softphones
- IMPACT 500 - Adjusting the sidetone
- IMPACT 500 - Battery removal and replacement guide
- IMPACT 500 - Changing settings for media mode
- IMPACT 500 - Changing the voice prompt language
- IMPACT 500 - Changing the volume
- IMPACT 500 - Charging the headset
- IMPACT 500 - Cleaning the products
- IMPACT 500 - Clearing the pairing list of the BTD 900c dongle
- IMPACT 500 - Clearing the pairing list of the headset
- IMPACT 500 - Connecting the dongle and pairing
- IMPACT 500 - Connecting via USB and charging the battery
- IMPACT 500 - Connection possibilities
- IMPACT 500 - Enabling / disabling an Audio Limiter
- IMPACT 500 - Enabling / disabling Busylight LED
- IMPACT 500 - Enabling / disabling mute notifications
- IMPACT 500 - Enabling / disabling voice prompts and tones
- IMPACT 500 - Headset buttons
- IMPACT 500 - Headset controls
- IMPACT 500 - If you are close to leave the Bluetooth range
- IMPACT 500 - Listening to media
- IMPACT 500 - Making calls using the headset
- IMPACT 500 - Managing multiple calls
- IMPACT 500 - Muting the headset's microphone
- IMPACT 500 - Package contents
- IMPACT 500 - Pairing the headset with your Bluetooth devices
- IMPACT 500 - Replacing the ear pad(s)
- IMPACT 500 - Switching the headset on / off
- IMPACT 500 - Transporting and storing the products
- IMPACT 500 - Updating the firmware
- IMPACT 500 - Using Active Noise Cancellation (ANC)
- IMPACT 500 - Using Microsoft Teams
- IMPACT 500 - Using TalkThrough
- IMPACT 500 - Verifying battery power / remaining talk time
- IMPACT 5000 Go - CH 50 charging stand
- IMPACT 5000 Go - Connecting the dongle to the charging stand
- IMPACT 5000 Go - Dongle overview
- IMPACT 5000 Go - Headset buttons
- IMPACT 5000 Go - Overview
- IMPACT 5000 Go - Pairing the headset and the dongle for 1st time use
- IMPACT 5000 Go Video - Charging
- IMPACT 5000 Go Video - How to manually connect the device to the PC
- IMPACT 5000 Go Video - Package Contents
- IMPACT 5000 Video - How to activate a volume limiter
- IMPACT 5000 Video - How to adjust the audio quality
- IMPACT 5000 Video - How to adjust the incoming call settings
- IMPACT 5000 Video - How to adjust the radio range
- IMPACT 5000 Video - How to adjust the ringtone and ringtone volume
- IMPACT 5000 Video - How to change the focus device
- IMPACT 5000 Video - How to charge
- IMPACT 5000 Video - How to configure a desk phone with the IMPACT SDW 5 BS
- IMPACT 5000 Video - How to connect a speakerphone
- IMPACT 5000 Video - How to connect a USB headset
- IMPACT 5000 Video - How to connect the UI 10 BL
- IMPACT 5000 Video - How to control conference calls
- IMPACT 5000 Video - How to control media
- IMPACT 5000 Video - How to control multiple calls
- IMPACT 5000 Video - How to control volume and mute the microphone
- IMPACT 5000 Video - How to invoke Microsoft Teams
- IMPACT 5000 Video - How to pair a bluetooth headset
- IMPACT 5000 Video - How to pair a mobile device
- IMPACT 5000 Video - How to pair an SDW headset to the SDW D1 USB
- IMPACT 5000 Video - How to power the headset on/off
- IMPACT 5000 Video - How to switch between the base station and the DECT dongle
- IMPACT 5000 Video - How to transfer a call
- IMPACT 5000 Video - How to update
- IMPACT 5000 Video - How to use the ear hook with the SDW 10 HS
- IMPACT 5000 Video - How to use the headband with the SDW 10 HS
- IMPACT 5000 Video - How to use the SDW D1 USB with EPOS Connect
- IMPACT 5000 Video - Package contents
- IMPACT 5000 Video- How to control calls
- IMPACT 700 - Updating the firmware
- IMPACT 700 Video - How to adjust the headset
- IMPACT 700 Video - How to connect the headset to a PC
- IMPACT 700 Video - How to control calls
- IMPACT 700 Video - How to control media on the headset
- IMPACT 700 Video - How to control multiple calls
- IMPACT 700 Video - How to control volume
- IMPACT 700 Video - How to factory reset the headset
- IMPACT 700 Video - How to mute/unmute the microphone
- IMPACT 700 Video - How to personalize settings in EPOS Connect
- IMPACT 700 Video - How to replace the leatherette earpads
- IMPACT 700 Video - How to update the headset
- IMPACT 700 Video - How to use Microsoft Teams
- IMPACT 700 Video - Package contents
- IMPACT 800 - Updating the firmware
- IMPACT 800 Video - How to adjust the headset
- IMPACT 800 Video - How to connect the headset to a PC
- IMPACT 800 Video - How to control calls
- IMPACT 800 Video - How to control media on the headset
- IMPACT 800 Video - How to control multiple calls
- IMPACT 800 Video - How to control the volume
- IMPACT 800 Video - How to factory reset the headset
- IMPACT 800 Video - How to mute/unmute the microphone
- IMPACT 800 Video - How to personalize settings in EPOS Connect
- IMPACT 800 Video - How to replace the leatherette earpads
- IMPACT 800 Video - How to update the headset
- IMPACT 800 Video - How to use Microsoft Teams
- IMPACT 800 Video - Package contents
- IMPACT D - Adjusting the headset
- IMPACT D - Battery removal guide
- IMPACT D - Charging the headset
- IMPACT D - Cleaning and maintaining
- IMPACT D - Configuring the DIP switches
- IMPACT D - Configuring the headset system
- IMPACT D - D 30 Battery Removal Guide
- IMPACT D - Echo in the speaker during call with a desk phone
- IMPACT D - How to boost charge
- IMPACT D - How to update firmware
- IMPACT D - Making calls
- IMPACT D - Package contents
- IMPACT D - Product overview
- IMPACT D - Resetting
- IMPACT D - Setting up and connecting the base station
- IMPACT D - Sharing a workplace and GAP pairing
- IMPACT DW - Adjusting the audio
- IMPACT DW - Adjusting the headset
- IMPACT DW - Adjusting the settings using the DIP switches
- IMPACT DW - Adjusting the volume
- IMPACT DW - Calling via the computer using the headset
- IMPACT DW - Calling via the fixed line phone using the headset
- IMPACT DW - Changing the direction of the volume up/down function
- IMPACT DW - Charging and storing the Headset
- IMPACT DW - Charging the battery
- IMPACT DW - Choosing the direction of the volume toggle switch
- IMPACT DW - Cleaning and maintaining the headset system
- IMPACT DW - Configuring the DIP switches
- IMPACT DW - Connecting the base station to a computer
- IMPACT DW - Connecting the base station to a fixed line phone
- IMPACT DW - Echo in the speaker during call with a desk phone
- IMPACT DW - Holding a conference call
- IMPACT DW - How to boost charge
- IMPACT DW - How to update firmware
- IMPACT DW - Labeling the headset
- IMPACT DW - Leaving the DECT range
- IMPACT DW - Link LED is red
- IMPACT DW - Lithium-polymer battery information
- IMPACT DW - Lowering background PC sounds during a call
- IMPACT DW - Muting the microphone
- IMPACT DW - Overview of the buttons
- IMPACT DW - Overview of the LEDs
- IMPACT DW - Package contents
- IMPACT DW - Pairing the headset and the base station
- IMPACT DW - Replacing the ear pads
- IMPACT DW - Replacing the headset's rechargeable battery
- IMPACT DW - Resetting
- IMPACT DW - Resetting the headset
- IMPACT DW - RJ45-RJ11 cable quick guide
- IMPACT DW - Setting up the base station
- IMPACT DW - Sharing a workplace
- IMPACT DW - Switching between Phone and PC mode
- IMPACT DW - User's voice echoing in the headset
- IMPACT DW - Using the headset with a third party base station (DECT-GAP telephone)
- IMPACT DW - Using your DECT headset for media playback (auto audio)
- IMPACT MB Pro - Activating and deactivating voice prompts
- IMPACT MB Pro - Adjusting the headset and wearing it
- IMPACT MB Pro - Adjusting the volume
- IMPACT MB Pro - Audio button
- IMPACT MB Pro - BTD 800 USB Dongle LED Indications
- IMPACT MB Pro - Changing the direction of the volume controls
- IMPACT MB Pro - Charging
- IMPACT MB Pro - Cleaning the headset
- IMPACT MB Pro - EPOS Connect software
- IMPACT MB Pro - Headset chargers overview
- IMPACT MB Pro - Headset LED Indications
- IMPACT MB Pro - Headset LED light Indications during charging
- IMPACT MB Pro - Headset out of the Bluetooth transmission range
- IMPACT MB Pro - Making calls
- IMPACT MB Pro - Managing multiple calls
- IMPACT MB Pro - Multi-function button
- IMPACT MB Pro - Muting the microphone
- IMPACT MB Pro - Out of the Bluetooth transmission range
- IMPACT MB Pro - Overview of the BTD 800 USB dongle button
- IMPACT MB Pro - Package contents
- IMPACT MB Pro - Pairing
- IMPACT MB Pro - Pairing the headset with a Bluetooth device
- IMPACT MB Pro - Product overview
- IMPACT MB Pro - Replacing the battery
- IMPACT MB Pro - Replacing the rechargeable battery
- IMPACT MB Pro - Resetting
- IMPACT MB Pro - Retrieving Information on the remaining talk time
- IMPACT MB Pro - Storing the headset
- IMPACT MB Pro - Updating the firmware
- IMPACT MB Pro - Using Microsoft Teams
- IMPACT MB Pro - Using the headset
- IMPACT MB Pro 2 - Using Room Experience feature
- IMPACT SD - Adjusting the audio signal by means of the dial tone
- IMPACT SD - Adjusting the automatic audio transmission "Auto Audio"
- IMPACT SD - Adjusting the headset
- IMPACT SD - Adjusting the volume
- IMPACT SD - Boost charging
- IMPACT SD - Calling via the computer
- IMPACT SD - Calling via the fixed line phone using the headset
- IMPACT SD - Charging the headset
- IMPACT SD - Charging the headset with the CH10 charger
- IMPACT SD - Cleaning and maintaining the headset
- IMPACT SD - Configuring the DIP switches
- IMPACT SD - Connecting the base station to a computer
- IMPACT SD - Connecting the base station to a fixed phone line
- IMPACT SD - Echo in the speaker during call with a desk phone
- IMPACT SD - Holding a conference call
- IMPACT SD - How to daisy chain a SD and SDW for a 8 person conference call
- IMPACT SD - How to update firmware
- IMPACT SD - Labeling the headset
- IMPACT SD - Leaving the DECT range
- IMPACT SD - Pairing the headset and the base station
- IMPACT SD - Replacing the battery
- IMPACT SD - Replacing the ear pads
- IMPACT SD - Resetting
- IMPACT SD - Switching between PC and Phone
- IMPACT SD - Switching the headset off during extended non-use
- IMPACT SD - Testing the headset system and sound quality
- IMPACT SDW - Adjusting and wearing the headset SDW 30 HS I SDW 60 HS
- IMPACT SDW - Adjusting how the system handles incoming calls with DIP switch 4
- IMPACT SDW - Adjusting the audio Quality with DIP switch 5
- IMPACT SDW - Adjusting the audio signal for desk phone using the ABC switch - SDW 5 BS only
- IMPACT SDW - Adjusting the microphone volume
- IMPACT SDW - Adjusting the radio range with DIP switch 3
- IMPACT SDW - Adjusting the ring tone and ring tones volume of the base station - DIP switch 7 and 8
- IMPACT SDW - Adjusting the volume
- IMPACT SDW - Assembling and wearing the headset SDW 10 HS
- IMPACT SDW - Auto Hook mode
- IMPACT SDW - Auto Link mode
- IMPACT SDW - Battery removal and replacement guide for SDW 10 HS
- IMPACT SDW - Battery removal and replacement guide for SDW 30/60 HS
- IMPACT SDW - Call handling (Ending a call)
- IMPACT SDW - Call handling (Making a call)
- IMPACT SDW - Call handling (Transferring calls to connected devices)
- IMPACT SDW - Charging the headset
- IMPACT SDW - Cleaning and maintaining the headset
- IMPACT SDW - Configuring the desk phone with DIP switches 1 and 2 (SDW 5 BS only)
- IMPACT SDW - Configuring the headset system
- IMPACT SDW - Connecting an optional USB headset or speaker
- IMPACT SDW - Connecting the base station
- IMPACT SDW - Connecting the base station to a computer
- IMPACT SDW - Connecting the base station to a fixed line phone - SDW 5 BS only
- IMPACT SDW - Connecting the base station to an optional electronic hook switch control (EHS)
- IMPACT SDW - Connecting the base station to an optional mechanical handset lifter
- IMPACT SDW - Connecting the base station to main power supply
- IMPACT SDW - Detaching headband, ear hook or neckband
- IMPACT SDW - DIP-switch configuration
- IMPACT SDW - Echo in the speaker during call with a desk phone
- IMPACT SDW - Enabling/Disabling voice prompts
- IMPACT SDW - Features that require the main power supply
- IMPACT SDW - Firmware update fails
- IMPACT SDW - Forced pairing
- IMPACT SDW - How to update firmware
- IMPACT SDW - Labeling the headset
- IMPACT SDW - Limiting the volume with DIP switch 6
- IMPACT SDW - Listening to media using the headset
- IMPACT SDW - Managing multiple calls
- IMPACT SDW - Muting the microphone
- IMPACT SDW - Overview of the base station
- IMPACT SDW - Overview of the base station LEDs
- IMPACT SDW - Overview of the BTD 800 USB Dongle LEDs with the SDW series
- IMPACT SDW - Overview of the busy light (UI 10 BL) LED
- IMPACT SDW - Overview of the dongle BTD 800 USB LED
- IMPACT SDW - Overview of the headset LED
- IMPACT SDW - Overview of the headset SDW 30 HS
- IMPACT SDW - Overview of the LEDs
- IMPACT SDW - Overview of the SDW 10 HS
- IMPACT SDW - Overview of the SDW 60 HS
- IMPACT SDW - Package contents
- IMPACT SDW - Pairing a headset via Bluetooth
- IMPACT SDW - Pairing a mobile phone or tablet via Bluetooth
- IMPACT SDW - Pairing and charging the headset before first use
- IMPACT SDW - Resetting
- IMPACT SDW - Restoring factory default settings (Reset)
- IMPACT SDW - Setting up conference call
- IMPACT SDW - Sharing a workplace
- IMPACT SDW - Swapping the direction of the volume buttons
- IMPACT SDW - Switching between DECT Dongle and base station
- IMPACT SDW - Switching between interfaces when MSH mode is activated
- IMPACT SDW - UN38.3 Test Report Summary for Lithium Battery Model: AHB732038TPCT
- IMPACT SDW - Unable to pair IMPACT SDW D1 dongle with a SDW headset
- IMPACT SDW - Using the dictation mode
- IMPACT SDW - Using the headset with the ear hook
- IMPACT SDW - Using the headset with the neckband
- IMPACT SDW - Using the motion sensor
- IMPACT SDW - Verifying battery life
- IMPACT SDW D1 USB Video - Package contents