ITEM NAME:Wireless Remote Control Switch 4CH Receiver with AC220V Transmitter New Four key Description: Operating Voltage: AC85ï ¼ 250V Operating frequency: 433MHz Standby current: 10mA Operating frequency: 433MHz Maximum load: 1000W/channel Transmitted power: ≠¥10mW Modulation: ASK amplitude modulation Reference distance :50-100 m Oscillation resistance: 330k ( adjusted as needed) Working chip: EV1527 Channel: 4CH Working mode: Self-lock, click, interlock Material: FR-4 Lead-free PCB Panel Size: 135 x 54 x 27mm/5.3 x 2 x 1inch Learning method: Pressing learning button for 3 seconds, the indicator light goes out (mean enter learning state), release learning button, and press any button of the remote controller, after the indicator light flashes for four times, it means success in learning. Clearing Method: Press the learning button for about 8 seconds, and the indicator light will turn on from off. Package Includes: 1 Piece 4 Button Wireless Remote Control Switch 1 Piece Relay Reciver Moule Note: Due to the quality differentiation of monitors and lighting effect, the picture may not reflect 100% the actual color of the item Please allow 1-3mm error due to manual measurement..Channel: 4CH. Press the learning button for about 8 seconds, and the indicator light will turn on from off. 1 Piece Relay Reciver Moule. Oscillation resistance: 330k ( adjusted as needed). Standby current: 10mA.