Features: 1.Waterproof: With a waterproof cover, it can effectively prevent rainwater from entering and causing damage to the voltmeter. 2.Protective: With intelligent control chip, it is fire?proof and high?temperature resistant, which can avoid damage to the device during the charging process. 3.Practical: You can grasp whether the battery voltage is within the normal use range in time, and can be used with USB to support a variety of charging electronic products, and the dual?port output is very convenient. 4.Wide Application Range: Suitable for all 12?24V cars, motorcycles, yachts, boats, lawn mowers, tractors, etc. 5.Decorative: With matte texture, it can better integrate with your car and decorate the interior of your car well. Specification: Item Type: Switch Panel Material: ABS and Metal Colour: Black Input Voltage: 12-24V Output Voltage: 5V Output Current: 2.1A Applicable Charging Range: Suitable for All 12-24V Cars, Motorcycles, Yachts, Boats, Lawn Mowers, Tractors, Etc. PackageList: 4 x Car Charger 1 x Voltmeter 1 x USB Charger 1 x Panel 4 x Screw 13 x Shrinkable Tube