• Model: A10 • Working range: 300m open space • Transmitter size: 75mm x 51mm x 20mm • Receiver size: 95mm x 65mm x 24mm • black/whiteA:One button two receivers •   black/whiteB: One button three receivers •   black/whiteC: Three buttons two receivers   The receiver plugs into the socket. 3 types of integrated plugs (EU / UK / USA).