About the Receiver: Model Number: -C2110081. 1. Working Voltage: DC12V-36V 2. Quiescent Current: Less than 6mA. 3. Working Temperature: -40 Degrees +80 Degrees. 4. Receiver Sensitivity: more than -105dBm. 5. Working Frequency: 433mhz. 6. Max Load Current: 10A About Learning and Deleting: Learning: Press the learning button, the indicator flashes and goes out, release your finger, press any button on the remote transmitter, the indicator flashes three times, which means the learning is successful. (the number of times you press the learning button depends on the working method you need) Deleting: Press and hold the learning button for about 8 seconds, the indicator light flashes several times and goes out, then press the remote control, the relay does not respond, which means the deletion code is successful. Colour: white+orange+black Material: PC+ABS About Working Method: Working method is changed by the learning button Momentary: Press the learning button 1 time. Relay: Press and hold -On; Release -Off. Bistable: Press the learning button 2 times. Relay: Press -On; Press the same button again -Off Locked: Press the learning button 3 times. Relay: Press -On; Press another button -Off. 2-channel Momentary + 2-channel Locked: Press the learning button 4 times. 2-channel Momentary + 2-channel Bistable: Press the learning button 5 times. 2-channel Bistable + 2-channel Locked: Press the learning button 6 times. About the Transmitter: 1.Buttons: 4 Buttons 2.Working Voltage: DC9V battery (battery not included) 3.Operating Frequency: 433MHz 4.Remote Distance: 200-2000M 5.Operating Current: 13 mAh Due to different product batches, the appearance may be different, which does not affect the use. Package Contents: 1 x Wireless 4CH Remote Control Receiver 1 x Remote Control Transmitter 1 x Suction Cup Antenna 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.