Feature 1With voltmeter, cigarette lighter socket, 2 USB charger, convenient to install and use 2Digital voltage display helps to real-time monitor your vehicle's electrical safety 32 USB charge slot can satisfy you charging needs to a great extent 4Blue LED light can monitor the state of your battery between full charged and discharged 5Waterproof design, blue LED light, easy to observe and safe to use Description: The item is a portable and practical car cigarette lighter with dual USB charger and blue voltmeter, which can be widely installed in 12V-24V boat, car, marine, etc. Dual USB port can be used for powering and charging 2 USB devices simultaneously. With easy and safe to use, it is really a wonderful car charger adapter for choice. Features: 1. With voltmeter, cigarette lighter socket, 2 USB charger, convenient to install and use. 2. Digital voltage display helps to real-time monitor your vehicle's electrical safety. 3. 2 USB charge slot can satisfy you charging needs to a great extent. 4. Fit for both 12V and 24V vehicles universally, like marine, boat, caravan, bus, truck. 5. Blue LED light can monitor the state of your battery between full charged and discharged, indicate a poor or bad charging system. 6. Waterproof design, blue LED light, easy to observe and safe to use. Specifications: Material: ABS Plastic Color: Black LED Color: Blue Voltage: DC 12V Waterproof Rate: IP44 Panel Size:15 x 4.2 x 5cm / 5.9" x 1.65" x 1.97" USB Socket Power Output: DC 5V 1A / DC 5V 2.1A Package Weight: 95g Fitment: Fit for 12V-24V Vehicle, Motorcycle, ATV, Boat, Car, Marine, UTV, Camper, Caravans, Travel Trailer, etc. Package Included: 1 x Cigarette Lighter Socket 1 x Blue Voltmeter 1 x Blue Dual USB Charger 6 x Insulated Terminals 4 x Screws Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Professionals install is strongly recommended to avoid trouble!