This is the Lightspeed receiver for the Logitech G PRO Wireless. Receiver only. I have tested its functionality up to the connection screen of the G HUB pairing tool, as I do not have the mouse body. It appears to be able to pair with a certain range of Lightspeed mice (however, multiple connections simultaneously are not possible, so it's 1:1). The following mice were selectable on the G HUB pairing screen: G903, G PRO WIRELESS, G403, G502 LIGHTSPEED, G603, G604 LIGHTSPEED, G703, G703 LIGHTSPEED, G900, G903 LIGHTSPEED.