Description: Features: Real-Time LED Voltmeter - This switch panels for trucks with large digital voltmeter display that shows 6-30V voltage, you can monitor the condition of the battery on your car or boat that if the voltage is under normal status. This Power Socket Panel Jack is built-in dual charging ports, two ports output: for DC 5V/2.1A,suitable for cellphone tablet gps and more deivces. Waterproof dust proof material can be used for the interior and exterior application,Install in any 12V-24V motorbike, Boat, Riding mower, tractor or car. Apply to all USB charging mobile phones or other electronic products. Run multiple accessories at one for time, very convenient and easy to use. Specifications: Item Type: USB Adapter fast Charger + 12V Power Plug With LED Voltmeter Housing Color: Black LED Voltage Display: Green,Red(optional) Panel Size: 154.5cm (1) USB Charger: Operating voltage: 12V-24V Interface: USB USB Output: for DC 5V/2.1A Indicator: Blue LED (2) Voltage Meter: Operating Range: for DC 6-30V - Widely used with electric equipment for power supply: Vehicle,GPS, mobile phone, camera, mp3 Quantity: 1 Set (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 4.No retail package Package includes: 1 X Car Charger Power Socket LED Voltmeter Power Socket Panel Jack 4 X Screws