A:AnswerHi! You can use one on Bluetooth and the other with the USB receiver that come with it. However, if you plan to game with them, definitely use the USB receivers instead of Bluetooth so you can utilize the Lightspeed no lag technology!
A:AnswerIt has both. That is one reason I wanted it. However do not expect to program the extra keys. Does not have Calculator Key. is noisy as is most mechanicals. Easy pairing with laptop.