Description: Featuring in over-current protection, short-circuit protection, and over-voltage protection, the multi-function car charger can be used in a variety of vehicles and can carry 12-24V voltage. The voltmeter adopts LED digital display, which makes the reading clear and convenient. Environmentally friendly flame retardant plastic shell has good electrical conductivity. It is made of ABS material, which is durable and portable. The length of the product is 3.7cm, the width is 4.3cm, the height is 2.9cm. It is suitable for most 12-24V vehicles with two battery pack like car, motorcycle, bus, ship, yacht, RV, pickup, truck, trailer, etc. Item Name: Car Voltmeter Material: ABS Product Color: Black LED Display Color: Red, Blue, Green Output Voltage: 5V Measuring Voltage: 6V-30V Input Voltage: DC12 10A/24V 20A Display: LED Digital Display Features: Energy-saving, High Accuracy, Durable Size Details: Product Size: 3.7cm x 4.3cm x 2.9cm/1.46" x 1.69" x 1.14" (Approx.) Surface Size: 36.5mm/1.44 Inch Drill Size: 29.2mm/1.15 Inch Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Car Voltmeter