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.Specifications:Type: A30Working Voltage: DC 6~80VVoltage Detection Range: DC 0~99.9V Error: +/-0.1VWorking 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 DCAttention: Because high voltage DC electric arc damages relay contact, so the electric load above DC60V load current is less than 10A.Contact Resistance: 100m(1A 6VDC)Mechanical Durability: 10 millions Electricity durability: Greater than 100,000 (20A~250VAC)Operating Temperature: -40~85CMaterial: PCB + ABScolour: blackPackage Contents:1 x Relay Switch ControllerOnly 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.