welcome to sllxg.vn , you could order the bag ,for nail , hair ,skin and so on 12V Battery Level Indicator Module 4 Paragraph 4 Onboard Battery Indicator LED Lights Board
Description:
1. On-board High Precision Voltage Detection Chip and Power Regulator Chip.
2. On-board 4-bit power indicator LED lamp, divided into three color display, red, yellow, yellow, green represent 20%, 50%, 80%, 100% of the power, respectively.
3. Reserve one battery test interface and two installation locating holes.
Specification:
Size: 20*16*7mm/0.78*0.62*0.27''
Note:
Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.

Included:
1 x 12V Battery Level Indicator Module