Feature: 1. After setting the voltage, the main board controls one of the wires of the charger through the relay to control the on and off of the charger's output. 2. Wide application range, suitable for various storage batteries/lithium batteries. 3. For example, to charge a 12V battery, the charging voltage range is 10.8‑14.4V, and the starting voltage is set to 10.8V. 4. The stop voltage is set to 14.4V, when the battery voltage is detected to exceed 14.4V, will automatically cut off the power to prevent overcharging. 5. Press the start key once to display the start value, long press to set the start value, press the stop key once to display the stop value, long press to set the stop value. Specification: Item Type: Battery Charge Control Module Material: PCB Scope of Application: All kinds of battery lithium batteries Input Voltage: DC6-60V Control Voltage: DC6-60V Control Current: ≤30A Control Accuracy: 0.1V Output Type: Direct output Voltage Error: ±0.1V Product Size: Approx. 81 x 54mm / 3.2 x 2.1in How to Use: 1. Connect the battery first (there will be no display if the battery is not connected); 2. Start Key: Press once to display the start value, long press to set the start value; 3. Stop Key: Press once to display the stop value, long press to set the stop value; 4. When the start value cannot be increased, please adjust the stop value first.. Package List: 1 x Module Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.