Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current. Balance protection ensures battery voltage balance for extended battery life. Stable heat dissipation through aluminum substrate. Safety protection against high voltage, reduces MOS tube breakdown, with ultra-low internal resistance MOS. Suitable for most electric tools, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, and other 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) Applicable 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 by batch, does not affect functionality. Color: Silver Material: PCB Package Contents: 1 x Protection Board 1 x Cable Only the above items are included. Other products are not included. Note: Lighting and display differences may cause slight color variation between the image and actual item. Measurement error allowed is +/- 1-3cm.