Learning: Press the learning button, the indicator flashes and turns off. Release the button, then press any button on the remote transmitter. The indicator flashes three times, indicating learning is successful. (The number of times to press the learning button depends on the desired working mode.) Clearing: Press and hold the learning button for about 8 seconds. The indicator light flashes several times and then turns off. After this, pressing the remote button results in no response from the relay, indicating code clearing is successful. About Receiver: Model No.: AK-C211008 1. Working voltage: DC 12V–36V 2. Quiescent current: Less than 6mA 3. Operating temperature: -40°C to +80°C 4. Receiver sensitivity: Better than -105dBm 5. Operating frequency: 433MHz 6. Maximum load current: 10A Working Modes (selected via learning button): Momentary: Press the learning button once. Relay operation: Press and hold → On; Release → Off. Toggle: Press the learning button twice. Relay operation: Press → On; Press the same button again → Off. Latched: Press the learning button three times. Relay operation: Press → On; Press another button → Off. 2-Channel Momentary + 2-Channel Latched: Press the learning button four times. 2-Channel Momentary + 2-Channel Toggle: Press the learning button five times. 2-Channel Toggle + 2-Channel Latched: Press the learning button six times. About Transmitter: 1. Buttons: 4 2. Working voltage: DC 6V 3. Operating frequency: 433MHz 4. Remote control range: 50–100 meters 5. Operating current: 12mAh 6. Encoding: EV1527 code Remote Quantity: 2 pcs or 1 pc Color: White & Black Material: Plastic + Metal Package Contents: 1 x Remote Control Switch Receiver 2 x Remote Control Switch Transmitter OR 1 x Remote Control Switch Receiver 1 x Remote Control Switch Transmitter Note: The package includes only the items listed above. Other items are not included. Note: Due to lighting effects and monitor settings, the color of the item may vary slightly from the images shown. Measurement error is permitted within +/- 1–3 cm.