ITEM NAME:3S Lithium Li-ion 18650 12V BMS Battery Capacity Level LED Indicator Panel Meter Descriptio n Description: 100% brand new and high quality. During the charging or discharging process, gently press the red button with your finger, and the LED light will be on. At this time, the current through the lamp board is about 30mA. Release your finger, the LED will go out, the light board line will be off, and no current will pass. The board has a reverse connection function, and the line is faulty and has no problem. It can be adjusted. A total of 5 small lights, showing the power, suitable for reverse inverter lithium battery power prompt! Specifications: Material: Circuit Board Color: White Size: 2.7*62*15.8mm Line Length: 140mm Package Included: 1 *Â Battery Capacity Indicator Board Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! 3S Lithium Li-ion 18650 12V BMS Battery Capacity Level LED Indicator Panel Meter.A total of 5 small lights, showing the power, suitable for reverse inverter lithium battery power prompt! 1 Battery Capacity Indicator Board. Release your finger, the LED will go out, the light board line will be off, and no current will pass.