User Manual
Table Of Contents
 Presence Grey Bluetooth headset
CLEANING AND MAINTAINING THE HEADSET19
Updating the firmware of the products
www.sennheiser.com/software
You can update the firmware of your headset system 
and Bluetooth dongle by using the free HeadSetup™ Pro 
software.
Download the software from 
www.sennheiser.com/software.
Install the software. 
To install the software, you need administrator rights 
on your computer. If necessary, contact your IT 
department.
Updating the firmware of the headset
To update the firmware, only one product may be connected at a time: 
Disconnect all other Sennheiser products before starting the update.
1
2
Headsetup Pro
Use a USB cable with mini USB plug to connect the 
headset to your computer.
Start HeadSetup™ Pro.
HeadSetup™ Pro checks if the installed firmware is the 
latest version available on the Sennheiser server. If 
required, upgrade to the latest version. 
Updating the firmware of the Bluetooth dongle BTD 800 USB
1
2
Headsetup Pro
Plug the Bluetooth USB dongle into the USB port of 
your computer. 
Start HeadSetup™ Pro. 
HeadSetup™ Pro checks if the installed firmware is 
the latest version available on the Sennheiser server. 
If required, upgrade to the latest version.










