Sunsbell 3 in 1 12V Power Socket Dual USB Car Cigarette Lighter Socket Adapter Charger with Digital Voltmeter Display Input: DC12V-24V ; USB Output Voltage: DC 5V ; USB Output Current: 2.1A/1A , Barrel inner diameter: 2.1cm/0.82inch ; Barrel inner length: 3.6cm/1.4inch Digital Voltmeter Display: Operated with the Digital Voltmeter, to check the voltage much easiler. Short circuit / overheat protection. Waterproof dustproof material can be used for the interior and exterior application. Detachable design: Use the 4 screws and 6 Insulated Terminals to change the position of USB Charger, Voltage Meter and Cigarette Lighter. Easy to install - no need to cut out a big hole in the panel. Can be installed vertically, horizontally or underneath the dash, or any flat surface. Compact design and practical function, perfect for travel use ; Run multiple accessories at one time, convenient and easy to use. Compatible for iPad, iPhone & iPod - fast charging at full speed (2.1Amps for iPad, 1Amp for iPhone/iPod). Compatible with: All USB charging mobile phones or other electronic products, such as vehicle,GPS, mobile phone, camera, mp3. Wiring kit for cigarette lighters to install in any 12V-24V motorbike, boat, riding mower, tractor,car,camper,caravans or travel trailer etc.