Item specifics: Color: Black Material: Environmental anti-retardant Plastic Board + Copper Panel Size: about 150x42x5mm Voltage Meter: Operating Range: DC 6-30V Display: Digital display The meter has easy to read Blue/Green/Red/Orange/White LED segments and connect to your 12/24 volt system. USB Charger Ports: Operating voltage: 12-24V Interface: 2 USB Output: DC 5V 1A/2.1A Indicator: Blue/Green/Red/Orange/White LED Widely used with electric equipment for power supply: Vehicle,GPS, mobile phone, camera, mp3 Car Power Supply Socket: Operating Voltage: DC 12V Barrel inner diameter:2.1cm/0.83 nBarrel inner length:3.6cm/1.42 nCan be used to light cigarettes: No Wiring kit for cigarette lighters to install in any 12V-24V motorbike, Boat, Riding mower, tractor or car. Optimised for iPad, iPhone iPod - fast charging at full speed (2.1Amps for iPad, 1Amp for iPhone/iPod). Apply to all USB charging mobile phones or other electronic products. Run multiple accessories at one time, very convenient and easy to use. 100% Brand new and high quality. Short circuit / overheat protection. Multifunctional product, perfect for travel use. Waterproof dustproof material can be used for the interior and exterior application. Can be installed vertically, horizontally or underneath the dash, or any flat surface. Easy to install - no need to cut out a big hole in the panel, these sit on the dash and fastened with 4 screws and 6 terminals(supplied). Package Included: 1x DC12-24V Car Charger Dual USB Port + LED Digital Display Voltmeter + Power Supply Socket 4x Screws 6x Terminals