12in voltmeter, used to monitor and display the voltage of car or truck battery, with 8?16V readings. It has a black dial, tinted lens and illuminated red pointer. 2With 10 solid color modes and 2 color cycle modes, built?in color memory function eliminates the need to change the color of the meter every time the vehicle is started. 3The pointer is driven by a stepper motor, which can accurately display the battery voltage. The parameter display is accurate and stable, and the power consumption is low. 4The black meter face with magnified tinted lens will add a stylish look to your gauge, and when installed on the dashboard, radio slot or drivers side pillar, it will enhance the overall appearance of your car or truck style. 5Smoked lenses during the day, and bright display at night, clearly and intuitively display the water temperature. Easy to mount, no complicated operations are required.