HP 975 Dual-mode Wireless Keyboard With the HP 975 Dual-mode Wireless Keyboard, you can connect up the three devices - two via Bluetooth and one via a 2.4 GHz USB Type-A dongle. Switch between devices at the touch of a button. This keyboard delivers a quieter typing experience through higher key height, dished finger-shaped keys and soft return technology. Plus customisable smart sensors help adjust backlit keys based on your room lighting condition and turns on the backlight when you approach or off when not in use. - Long battery life - 20+ programmable keys and backlight configuration - Comfortable, quiet, soft keys with backlighting that activate when you approach. - Data and PC protection