Features: With start/stop function, the module enters infinite cycle mode after starting, and the relay works on and off according to the set time. Programmable low voltage battery switch for DC 12-36V lead-acid battery and lithium-ion battery. It is a protection switch module, not including batteries themselves. Built-in momentary push button to set the low voltage disconnect parameter and a 3-digit red LED display shows the parameter for easy use. When the battery voltage reaches the set values, the module automatically disconnects the load to prevent the battery from being over-discharged, extending the battery life. The display is accurate, the switch module opens and closes quickly when close to the minimum voltage; Settings are stored non-volatilely, it can retain the setting when power is off. Specifications: Material: PCB Size: Approx. 5.7x4.2x1.9cm/2.24x1.65x0.74inch Power Consumption: <1.5W Input Voltage Range: for DC 12-36V - Control Accuracy: 0.1V - Compatible Battery: Lead-acid battery, Lithium-ion battery, Solar panel battery Note: 1.Please allow 1-2 cm errors due to manual measurement, please make sure you don't mind before ordering. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you for your understanding. Package includes: 1x protection module