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. Working Voltage: DC 6~80V Voltage Detection Range: DC 0~99.9V Error: +/-0.1V Working Current: 8mA/24V(relay open, LED displays OFF about 4mA/24V); 58mA/24V(relay closed) A set of transformations(normally open/normally close, NO/NC) Contact Load: NO: 30A/250V AC or 30A/30V DC; NC: 20A/250V AC or 20A/30V DC Attention: Because high voltage DC electric arc damages relay contact, so the electric load above DC60V load current is less than 10A. Contact Resistance: ≤100mΩ(1A 6VDC) Mechanical Durability: 10 millions Electricity durability: 100,000 (20A~250VAC) Operating Temperature: -40~85°C Color: Black Material: PCB + ABS Package Contents: 1 * Relay Switch Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.