How to Use: Wired connection: plug and play. Wireless connection: Press and hold connect for two seconds, the red and blue lights flash to enter the pairing mode, and the computer can turn on the BT connection. Specification: Item Type: USB Foot Switch Pedal Material: ABS Connection Type: Wireless BT/Wired USB Switch Type: Mechanical Switch Battery Type: Built in 220mah Lithium Battery Compatible Systems:For Windows,for Linux, for OS X,for Android (if It is a for Linux or for OS X, You Need to Modify the Button Definition in Windows, and then Plug the Switch into for Linux or for OS X to Use) Package List: 1 x USB Foot Switch Pedal 1 x Data Line 1 x English User Manual Note: Ships with built in battery.