Learning: learning button, the indicator flashes and OFF, loosen finger, any button of the remote transmitter, indicator flashes three times, meaning learning succeeds.(how many times the learning button according to the working way you need) Clearning: Hold learning button about 8 seconds,indicator light flashes several times and off, then remote ,Relay not Respond, it means clearning code successful. About Receiver: Model No.: -C211008 1. Working voltage: DC12V-36V 2. Quiescent condition: Less than 6mA 3. Working temperature: -40℃ - + 80℃ 4. Receiver sensitivity: more than -105dBm 5. Working frequency: 433mhz 6. Max load current: 10A About Working way: Working way changed by Learning button Momentary: the Learning Button 1 times. Relay: and hold → On; Release → Off. Toggle: the Learning Button 2 times. Relay: → On; same button again → Off. Latched: the Learning Button 3 times. Relay: → On; other button → Off. 2 channel Momentary + 2 channel Latched: the Learning Button 4 times. 2 channel Momentary + 2 channel Toggle: the Learning Button 5 times. 2 channel Toggle + 2 channel Latched: the Learning Button 6 times. About Transmitter: 1. Buttons: 4 Buttons 2. Working Voltage: DC6V 3. Operating frequency: 433MHz 4. Remote Distance: 50-100M 5. Operating Current: 12 mAh 6. Encode: EV1527 code Remote Quantity: 4PCS Colour: White & Black Material: Plastic+Metal Package Contents: 2 x Remote Control Switch Receiver 4 x Remote Control Switch Transmitter 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.