- On-board precision voltage detection chip and power regulator chip
 - Onboard four battery indicator LED lights, three colors display, red, yellow, yellow, green representing 20%, 50%, 80% and 100% of the electricity
 - set aside all the way battery testing interface, and two mounting holes located
 - PCB size: 22.2 (mm) x17.2 (mm)
 - 12V battery power indicator segment
 
- 12V battery level indicator module 4 paragraph 4 onboard battery indicator LED lights
 - High Quality Integrated Circuits
 
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