Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current from the battery. Balance protection for battery voltage balance to extend battery life. Stable heat dissipation through aluminum substrate for improved safety. Protection against high voltage, reduced MOS tube breakdown risk, and ultra-low internal resistance MOS. Suitable for most electric tools, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, and other similar applications. Model: 4S120A balanced with same port - 3.2V Continuous working current: up to 120A Momentary working current: up to 300A Charging voltage: 14.8-16V Charging current: up to 50A Overcharge protection voltage: single cell 3.75V ± 0.025V Over-discharge protection voltage: single cell 2.10V ± 0.05V Short circuit protection: Yes (short circuit testing not recommended) Compatible assembly: three strings of nominal 3.2V lithium iron phosphate batteries Load power: DC 12V, up to 1500 watts (actual motor starting current less than 300A) Note: Product appearance and color may vary slightly between batches, which does not affect functionality. Color: Silver Material: PCB Package Contents: 1 x Protection Board 1 x Cable Note: The package includes only the items listed above. Other products are not included. Due to lighting effects and monitor settings, the actual color of the item may vary slightly from images. Measurement error allowed within +/- 1-3 cm.