Used for: Widely used in automotive, modified car cigarette lighter parts Motorcycle/Boat/ATV/UTV/RV/caravan/trailer and so on Size: about 15 times; 4.5 times; 5.5cm Uses: Charging, Voltage, Take Electricity Power: 100W Input Voltage: 8-30V Voltage: 6-30V Output Voltage: 8-30V For marine use quality components. Panel combinations with voltmeter, USB charger and d 12V socket. USB Charger: Working Voltage: 12V Interface: 2 Output: DC 5V 2.1A Voltmeter: Working Range: DC 4-24V Display: Blue/Green Voltage, Digital Display Cigarette Lighter Socket: Working Voltage: DC 12V 1 Compact Design, Easy Installation, Access Power Cord to Measure Car and Motorcycle Battery Voltage. 2. High brightness LED three digital display, easy to view. 3. Always monitor the battery voltage so that the battery in normal operating voltage is used to prolong and protect the battery and motor life. Car Cigarette Lighter Socket * Car cigarette lighter socket 12V-24V, suitable for various car conversion plug standard. * Car cigarette lighter socket can not be used for cigarette lighter * Car cigarette lighter socket wiring can not be positive and negative intermodulation, so as not to burn electronic products Package Included: 1 x Mounting Bracket 1 x Cigarette Lighter Socket 1 x USB Charger 1 x Voltmeter 1 x Accessory Kit (4 screws and 6 wires in connecting)