Features: brand new and high quality Easy to install, fits to almost all panel locations you desired! Embedded in 3-bit LED digital display, clearly shows you the current precise readings of working volts, better helps you to early notice your car voltage condition Made of Eco-friendly & flame retardant durable ABS plastic and good conductivity pins with black matte surface treatment, wear and tear resistant for long lasting durability Over-current, over-volt and short circuit for protection, well protects the whole circuit, fits for most 12-24V car motorcycle ATV UTV RV vehicles and marine boat Round double voltmeter, real for time monitoring for 2 battery packs of vehicles Better avoid emergent dead battery at starting car engine! Specifications: Item: LED Digital Double Voltmeter Model: DS4050-AL Measuring range: 6-30 (V) Input voltage: 12-24 (V) Output voltage: 5 (V) Size:approx 4x3.7x2.7cm/1.57x1.46x1.06in Material: Plastic LED Color: Blue/ Red/ Green Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 0.2cm measuring deviation due to manual measurement. Package includes: 1 PC x LED Digital Double Voltmeter