Specification: Product Name: Voltage Meter Material: PC Shell Color: Black Display Light Color: Blue / White / Green / Orange / Red Switch Type: Touch Switch Size: 37mmx17mm (WxH) Power: 0.18 (W) Voltage Input: 5V-48V Interface Type: Anode and Cathode Type: LED Digital Voltmeter Quantity: 1pcs Fitment: Universal for all cars, motorcycles,boat,truck,van, and other universal models. Features: -The Touch ON OFF Switch makes it easy to use and also save energy,touch about 5s to turn on or turn off the power. -Waterproof; Flame retardant material. -Twist-and-Lock system.Display: 3-bits, LED digital tube. -Mini size and easy to install,work great for checking Voltage. -Used to monitor the storage-battery voltage, with reverse connection protection function, line will not be burnt. -Mounts in a 1-1/8" hole in panels up, 0.25" thick, a nylon retaining nut holds the meter in place. -The state of your battery between full charged and discharged -The meter has easy to read LED segments and connect to your 12 volt system. -Used to monitor the storage-battery voltage, with reverse connection protection function, line will not be burnt. -Timely grasp the state of battery voltage, voltage measurement purposes can also be used for other products. Package Includes: 1x Voltage Meter 2x Insulated Terminals Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3.There are no instructions included in this kit.If you want to know how to use or install it,please contact us by Email.We will provide help as much as possible.