Meters -4 Channel Relay Module Control Panel With Remote Control For Arduino 12v Highlights Brand Generic 4 Channel Relay Module Control Panel With Remote Control For Arduino 12v Description: Can be bi-directional high and low trigger , support a variety of single chip, support Arduino. Anti-interference ability, using diode anti-detection protection. Contact the relay with the use of double-sided thick wiring, for large current, safe and reliable. Each relay output is normally open and normally closed two groups of electric shocks, easy to use and flexible. Finished product through 100% functional and stability functional testing. Through MCU control, you can achieve external self-locking mode and two non-self-locking ways to trigger the relay. Specification: Material: Metal, Plastic, Electrical Elements Size (LxWxH): Approx. 73x51x19mm / 2.87x2.0x0.75inch The color red Available voltage: 3V, 5V, 12V, 24V Package includes: 1 piece Relay module board 1 piece Cotrol remote control Note: The remote control to be equipped with a voltage of more than 5V or remote control cannot work well with the reader module. Due to the measurement difference, pls allow 1-3mm error.