Universal Wireless Remote Control Switch DC 12V 4CH Relay Receiver Module With 4 Channel RF 433 Mhz Transmitter DC 12V 433 Mhz RF Wireless Remote Control Switch relay 433mhz 4CH Receiver Module For Learning code Transmitter remote About Receiver: Model No.: AK-RK04S-12-B 1. Working voltage: DC12V 2. Quiescent condition: Less than 6mA 3. Working temperature: -40 Degree +80 Degree 4. Receiver sensitivity: more than -105dBm 5. Working frequency: 433mhz 6. Output voltage: DC and AC is optional 7. Output current: Less than 3A 8. Max load current: 10A 9. Size: 7.2 x 5.2 x 2.6cm About Working way: Working way changed by jumper on pins Momentary: jumper doesn't connect any two pins. Relay: Press and hold -> On; Release -> Off. Toggle: jumper connects the pin T and pin S. Relay: Press -> On; Press same button again -> Off Latched: jumper connects the pin L and pin S. Relay: Press -> On; Press other button -> Off. About Learning and clearing Method: Learning: Press learning button, the indicator OFF, loosen finger, press any button of the remote transmitter, indicator flashes three times, meaning learning succeeds. Clearning: Hold press learning button about 8 seconds,,indicator from OFF to ON,then press remote ,Relay did not Respond ,it means clearning code successful. About Transmitter: 1.Buttons: 4 Buttons 2.Working Voltage:DC6V (2PCS CR) 3.Operating frequency :433MHz 4.Remote Distance: 20-50M 5.Operating Current: 13 mAh 6.Encode: EV1527 code 7.Size: 5.7 x 3.2 x 1.1cm _x000D_