1. Universal: free modification, electronic product equipment 12-24V car can be universal, as long as you can modify the position can be modified, suitable for all cars, motorcycles and other Universal models. Motorcycle/boat/ATV/UTV/camping car/caravan/travel trailer etc. 2. Made of high-quality pc material, it is flame-retardant, impact-resistant, simple to install, stable in performance, high-quality material, . 3. Safe use with Contact switch, real-time detection of voltage battery, light Contact for about 5s to turn on or off the power. Support voltage value display. Easy to use and save energy. 4. The meter has easy-to-read LED segments and connects to your 12-volt system. Used to monitor the battery voltage, with reverse connection protection function, the circuit will not be burned. 5. Small size, easy to install, very suitable for checking voltage, suitable for 12V-24V. Specifications: LED display color: blue Size: about 3.7 x 3.2cm Input voltage: DC 12V /24V Measuring range: 6-36V Working temperature: -40 to 80 Precaution: Battery voltage monitoring shows that when the car is not started, it is lower than 12V. Please pay attention to timely replacement of the battery. After starting, when it is higher than 15V, please pay attention to repair the battery and car battery Colour: black Material: PC Package Contents: 1 x Contact voltmeter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.