Feature: 1. For 12‑24V Battery: Universal digital display battery charging control board, suitable for 12‑24V various storage batteries, extending battery life. 2. Control On and Off: The main board controls one of the wires of the charger through a relay to achieve the function of controlling the charger output on and off. 3. Multiple Functions: With full automatic power off, automatic charging when power is lost, and real time voltage monitoring functions. 4. Memory Value Setting: Support memorizing the set value, automatically keep after setting, no need to set again. 5. High Performance: 1.6mm thick double layer circuit board, RF‑4 dense glass fiber material, has high mechanical strength and high dielectric performance. 6. Fine Production: The layout of the circuit board is beautiful, and the chip technology is adopted, and each plugin is professionally welded. Specification: Item Type: Charging Control Module Product Model: HCW-M632 Input Voltage: DC10-30V Control Current: 20A maximum Control Accuracy: 0.1V Output Type: Direct output Voltage Error: ±0.1V Application: 12-24V various storage batteries Product Size: Approx. 82 x 58 x 18mm / 3.2 x 2.3 x 0.7in. Package List: 1 x Charging Control Module Note: This module must be connected to the battery to work normally, otherwise the screen will not display.