Highlights Control lights, TV, motors, fans, cameras, video signals, audio signals, electric doors, locks, windows, curtains, cars, etc. You would set different codes if you use two or more receivers in the same place The wireless signal can pass through walls, floors & doors One/ several transmitters can control one/ several receivers Transmitting frequency: 433 M Hz Receiver: Supply Voltage: 12V DCStatic Current: = lt; 6m A Frequency: 433MHZSensitivity: gt;= -105 d B Relay Spec: 4A, 120VAC; 3A, 24VDCTransmitter: Power Supply: 1pc 23A-12V battery (included) Channel: 8CHDimension: Approx. 3.7cm (W), 8.5cm (L), 1.6cm (H) Range: 300m Specifications Shipping Weight (kg): 0.166 Dimension (cm): 9.5 x 7.5 x 4.5 Package Contents 1 Receiver 1 Transmitter 1 12V battery