Feature:
Universal Battery Meter: Waterproof Volt Gauge is compatible with 12V Motorbike Car / Boat / ATV / UTV / Camper / Caravans / Travel Trailer etc.
Color Instruction: 15V Voltage Range, 11.3V-11.9V RED Led indicate the battery should be change, 12.0V-12.5V YELLOW Led indicate normal when the car engine is OFF, 12.6V-15V GREEN Led indicate normal when the engine is ON.
Alarm Flash: LED will alarm flash if the voltage is higher than 15V, support your safe use.
Waterproof: The voltmeter is IP65 waterproof. In addition, it with twist and lock system,which is easy to install.

Specifications:
Color: Black
Material: ABS
Operating voltage: 12V
Screw mounting hole: about 4.0mm
Display: digital display
Display color: blue