Product model: AA42 Operating voltage: 12 volts, Installation position: rear Screen type: None, Voice type: Real voice, Sound switch: None, Switch function: None, Microphone wire length: 2 meters, Rear sensor wire length: 2.3 meters, Front sensor wire length: None Products include: sounder *1, sensor *4, controller *1, double-sided tape *2, power cord *1, drill *1, packaging *1, Single weight: 380G/ set, Single package size: 234*173*54MM, Packing quantity: 30 sets/box, or other packing quantity, Carton size: 50*29*54CM【A30#】 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Single weight: 340G/ set, Single package size: 178*130*45MM Packing quantity: 50 sets/box, Carton size: 67*25*37.5CM(A50#)