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, press any button on the remote; if the relay does not respond, the code has been cleared successfully. 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 About Working Modes: Working mode is changed by pressing the learning button. Momentary: Press the learning button once. Relay: Press and hold → On; Release → Off. Toggle: Press the learning button twice. Relay: Press → On; Press the same button again → Off. Latched: Press the learning button three times. Relay: 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 distance: 50–100 meters 5. Operating current: 12mAh 6. Encoding: EV1527 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 Only the items listed above are included; other accessories are not included. Note: Lighting effects and display settings may cause slight color differences between the image and the actual item. Measurement error allowed is +/- 1–3 cm.