Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of battery Balance protection, battery voltage balance, make battery life longer Stable heat dissipation, stable heat dissipation of the aluminum substrate, safer TVS safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal resistance MOS Suitable for most electric tools on the market, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc. Model: 4S120A balanced with the same port-3.2v Continuous working current: within 120A Momentary working current: within 300A Charging voltage: 14.8-16V Charging current: within 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 test is not recommended) Applicable assembly: three strings of nominal 3.2V lithium iron phosphate batteries Load : DC 12V within 1500 watts (actual motor starting current is less than 300A Please note: Different batches, product appearance and color may be different, does not affect the use color:Silver Material:PCB Package Contents: 1 x Protection Board 1 x cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.