The AirTurn DUO features the BT-106 Bluetooth Transceiver which is a multifunction remote with two jacks that support up to four external momentary switches and allows you to control hundreds of compatible apps on a Bluetooth-equipped Mac, PC, iOS, or Android device. The unit can be used to advance pages or slides, scroll lyrics, play media, teleprompt, initiate effects, shoot photos, read books, music, and more. The unit has an internal USB rechargeable battery with a 100-hour life.