Digital display DC voltage detection, control the relay output.
DC 6~80V relay interface board with 2 buttons for easy operation. With clear LED display, convenient to check the value.
Adjustable Voltage Detection Range: DC 0~99.9V.
When the measured voltage is lower than the lower limit or higher than upper limit value, the relay works. Can be used for voltage detection switch, battery over/under voltage protector or discharge meter. Comes with a cover for protection.