About Working way: Latched: Relay:Press → On; Press other button → Off. About Learning and clearing : Learning:Press learning button until the indicator ON, loosen finger, press any button of the transmitter, indicator flashes three times, meaning learning succeeds. Clearning: Hold press learning button about 8 seconds, indicator from ON to OFF, then press remote, Relay not Respond, it means clearning code successful. About Receiver: Model No.:-02 1. Working voltage:220V 2. Working temperature:-40 Degree +80 Degree 3. Receiver sensitivity:more than -114dBm (RXB8 receiver module ) 4. Working frequency:433mhz 5. Output voltage:Output 220V 6. Max load current:30A 7. Applications:Water Pump, Motor ,Lamp About Transmitter: 1. Buttons:2 Buttons 2. Working Voltage:DC9V9 3. Operating frequency:433MHz 4. Remote Distance:20-3000M 5. Operating Current:13 mAh 6. Encode:Fixed code / EV1527 code Colour:White Material:Plastic Size:Receiver:55x110x35mm Package Contents: 1 * 1 * remote control (delivered without 1 x 9V battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.