Monitor your 12v battery voltage with an easy-to-install digital voltmeter. Simply mount into a 1-1/8" hole, tighten the plastic nut, and connect your power source and ground. 11.3V - 11.9V RED indicates the battery should be changed12.0V-12.5V YELLOW indicates normal when the car engine is OFF12.6V-15V GREEN indicates normal when the engine is ON Operating Temperature: -25C to +60C. Dust and splash-proof IP65 rating. However, do not submerge in water. Designed for 12 volt DC power supplies found in most vehicles such as custom cars, boats, trucks, off-road ATVs / UTVs, campers, trailers, go karts, motorbikes, and much more. Easy to wire with clearly marked (+) and (-) pins. Voltage range: 5 - 15V with colorful scale. LED warning light flashes when voltage outside of normal operating conditions. Compact circular design makes this gauge ideal for dashboard and through-panel installation. Simply mount into 1-1/8" round hole and connect battery and ground. 4.5 out of 5 starsMGI SpeedWare Voltmeter Gauge 12vDC with Blue LED Digital Display (Long Body) Share: Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive. Fields with an asterisk * are required ** 01 02 03 04 05 06 07 08 09 10 11 12 01020304050607080910111213141516171819202122232425262728293031 *Enter the store name where you found this product* Please select province Please select province * 01 02 03 04 05 06 07 08 09 10 11 12 01020304050607080910111213141516171819202122232425262728293031