... frequency technique4) Strong long standby time,large battery range,low consumption5) Low battery power warning6) Thin size design(6mm) ... ) Voltage: 12V (Transmitter) 3V (Receiver)2) Battery: 27A 12V, 1 piece for Transmitter, CR2032 3V, 1 piece for Receiver3) ... in the world!""Reliable quality.""Satisfied profit.""Low battery consumption""Learning function is very useful"………………………………………Factory Brief: ...