Features: Digital display DC voltage detection, control relay output. Adjustable Voltage Limit: 0-99.9V If the measurement voltage is lower than the lower limit or higher than the upper limit, the relay will work. Can be used with voltage detection switches, battery overvoltage and undervoltage protectors, discharge meters, etc. Notice: Relay control panel has single mode voltage detection function. Max. Trigger current is 10A (AC 277V, DC 30V). Do not connect to loads exceeding DC 30V. This relay module is not suitable for discharging lithium batteries. The polarity of voltage detection cannot be reversed. User must turn off the power before connecting the wire. Specifications: Relay Voltage: DC 12V Working Power: DC 10-16V Voltage Detection Range: DC 0-99.9V Error: +/-0.1V Timing Range: 0-999 Min Cycle Transformation Set (Normal Open/Normal Closed) Contract Load: 10A/277V AC, 10A/30V DC Contract Resistance: ≤1000mΩ A-6V DC) Mechanical Durability: >10 million times Electrical Durability: >100,000 times (10A-250V AC) Standby Current: 16mA 12V, Digital Display Close Minimum 6mA/12V, Relay Timely 45mA/12V Working Temperature: -40-85°C Dimensions: 50 * 40 * 20mm Weight: 27 g / 0.9 5 oz. Package List: 1 * Relay Switch Control Module