Product model: A41S Operating voltage: 12 volts, Installation position: rear Screen type: None, Sound type: BIBI sound, Sound switch: Yes, Switch function: Loud/low/mute, Microphone wire length: 2 meters, Sensor wire length: 2.3 meters, Products include: sounder *1, sensor *4, controller *1, double-sided tape *2, power cord *1, drill *1, packaging *1, Single package size: 234*173*54MM, Single weight: 310G/ set, Packing quantity: 50 sets/box, Carton size: 67*25*37.5CM(A50#)