This 1-channel remote control system helps you to take control of your gadgets, cars, and garage gates. Easy to install and to use. Descriptions: Control lights, TV, motors, fans, cameras, video signals, audio signals, electric doors, locks, windows, curtains, cars, etc. The wireless signal can pass through walls, floors and doors Single channel Transmitting frequency: 433MHz Please refer to the user manual for detailed operation Receiver: Supply Voltage: 12V DC Static Current: =< 6mA Frequency: 433MHZ Sensitivity: >= -105 dB Relay Spec: 4A, 120V AC; 3A, 14V DC Operating Temperature: -40℃ to 80℃ Size(L x W x H): Approx. 7.5 x 5.5 x 2.8cm / 3 x 2.2 x 1.1 inch Transmitter: Channel: 1CH Range: Approx. 20m Size(L x W x H): Approx. 5.5 x 3.1 x 1.1cm / 2.2 x 1.2 x 0.4 inch Color: Black and silver Package Includes: 1 x Receiver 1 x Transmitter ( Powered by 2 x CR2016 battery. It is not included. ) 1 x Instruction of usage