Description Features: With start/stop function, the module enters infinite cycle mode after starting, and the relay turns on and off according to the set time. Programmable low voltage disconnect switch for DC 12-36V lead acid and lithium ion batteries. This is a protection switch module; batteries are not included. On-board momentary push button to set the low voltage disconnect parameter, with a 3-digit red LED display for easy operation. When the battery voltage reaches the set value, the module automatically disconnects the load to prevent over-discharging and extend battery life. Display is accurate, and the switch responds quickly when approaching minimum voltage. Settings are stored in non-volatile memory and retained after power is turned off. Specifications: Material: PCB Size: Approx. 5.7 x 4.2 x 1.9 cm / 2.24 x 1.65 x 0.74 inch Power consumption: 1.5W Input voltage range: DC 12-36V Control accuracy: 0.1V Compatible batteries: Lead acid, lithium ion, solar panel systems Note: 1. Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences between monitor displays, the image may not reflect the actual color of the item. Thank you for your understanding. Package includes: 1 x Protection Module