Accurate and Reliable: CE,ROHS certified high quality material and strict manufacturing process ensure the accuracy of battery status, qualified as a reliable server, avoid replacing the voltmeter frequently, safer for driving Premium quality: high-level waterproof design, high-resolution digital LED display that shows battery status even in adverse situations Wide applications: works for 12V -24V, for monitoring the battery voltage of motorcycle car / boat / ATV / UTV / motorhome / caravans / travel trailer, etc. Easy to install: mini size, three colors optional, just plug it into your car. With reverse connection protection function, the line will not be burned. 100% Money Back Guarantee: Refund or replacement for any quality issue is available, 24/7 friendly customer service, any questions, please contact seller directly Description: This round meter with LED digital display is used to monitor battery voltage. It is equipped with reverse connection protection function. The cord is not burned and the twist and lock system is absent, super easy to install and use. Technical Data: Works for 12V-24V: Used to monitor battery voltage. Waterproof: YES. LED digital display: YES. Measure voltage: 6-30V Size: 1.4*1.4*0.5cm Interface type: anode and cathode Eco-friendly material: made with plastic of high quality, for the sake of improving usability. Include Package:2*LED Voltmeter 4*Insulated Terminal