Product Description: Overview: Enhance your remote control capabilities with the Smart 433MHz 4-Channel Wireless Relay RF Remote Control Switch Receiver. Ideal for various applications, this versatile system allows you to control devices remotely with ease. Featuring multiple working modes and a wide operating voltage range, it ensures reliable performance in diverse environments. About the Receiver: Model No.: AK-C211008 Working Voltage: DC 12V-36V Quiescent Condition: Less than 6mA Working Temperature: -40C to +80C Receiver Sensitivity: More than -105dBm Working Frequency: 433MHz Output Voltage: Optional for DC and AC Max Load Current: 10A Size: 96 x 80 x 29mm Working Modes: The working mode can be changed using the learning button: Momentary Mode: Press the learning button once. (Relay: Press and hold -> On; Release -> Off) Toggle Mode: Press the learning button twice. (Relay: Press -> On; Press same button again -> Off) Latched Mode: Press the learning button three times. (Relay: Press -> On; Press other 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. Learning and Clearing Method: Learning: Press the learning button until the indicator flashes and turns off. Release the button and press any button on the remote transmitter. The indicator will flash three times, indicating successful learning. Clearing: Hold the learning button for about 8 seconds until the indicator light flashes several times and turns off. Test by pressing the remote; if the relay does not respond, the code has been cleared successfully. About the Transmitter: Buttons: 4 Working Voltage: DC 9V Operating Frequency: 433MHz Remote Distance: 200-2000M Operating Current: 13mAh Encoding: EV1527 code Package Includes: 1 x Receiver 3 x Remote Transmitters