Descriptions : 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 and doors You can rotate the motor in the positive or reversal direction with the One / several can control one / several receivers Transmitting frequency : 433MHz Please refer to the user manual for detailed operation Receiver : Supply Voltage : 12V DC Static Current : =& lt ; 6mA Frequency : 433MHZ Sensitivity : & gt ;= - 105 dB Relay Spec : 4A , 120V AC ; 3A , DC Operating Temperature : - 40 ℃ to 80 ℃ Size ( L x W x H ): Approx . 2 . 9 x 2 . 1 x 1 inch /& nbsp ; 7 . 4 x & nbsp ; 5 . 3 x 2 . 5cm : Channel : 2CH Powered by 1pc 23A 12V battery & nbsp ;( not included ) Range : 200m Package Includes : 1 x Receiver 1 x 1 x Instruction of usage