●Smart PCB Battery Management System can extending battery life-span, improve performance.●Automatically charge battery function or static balance function for the battery system.●Mobile phone software to manage the detecting the battery working status and some parameters setting over wireless BT.●Stable various protective functions for charging and discharging, such as accurate overcharge protection, over-discharge protection,temperature protection and short circuit protection.PRODUCT PARAMETERS:Usage:Ternary Lithium Li-ion Battery PackOverload Detection Voltage: 4.25±0.05VOverload Discharge Voltage: 4.15±0.05VBalanced Turn-On Voltage: 3.8VBalanced Output Voltage: 3.8VOverdensity Detection Voltage: 2.7±0.1VOver Discharge Discharge Voltage: 2.8±0.1VInternal on-resistance of main circuit: ≦ 20Temperature Protection: Charge -40~65℃, Discharge -40~70℃YOU WILL RECEIVE:1 x Smart Protection Board, 1 x BT Component (BT Activation Button), 1 x Matching Balance Cable, 1 x NTC Cable, 1 x RS485 cable, 1 x B-P- cable, 1 x English version wiring manual.PLEASE NOTE:1. [Size] Due to manual measurement, please allow 1 cm / 0.39 in measurement difference.2. [Color] Due to different computer monitors, the color of the product may be slightly different from the picture, please understand.AFTER SALES SERVICE:If you have any questions about our PCB Protection Plate, please contact us via email without hesitation and we will do our best to solve your problem.