The ASL 520BG Remote Attendant Control allows a attendant or an aide to have control over one or more directions of a power wheelchair by a wireless control. It can be used as a training tool to control right and/or left turns while in the learning process, or it can be used as a full attendant control device when needed. The remote attendant control is compatible with all wheelchair electronics that allow for digital control. Remote Requires 9 Volt Battery Included. Receiver Requires 24 Volt Power Source Not Included.