Check the listing for details. 12V 4 In 1 Panel Dual USB Charger LED Voltmeter Cigarette Lighter Socket Outlet. Color: Black, Condition: New. Listed at 14.99 USD. Introduction: With more and more car related products application, such as audio, refrigerator, cleaner, inflatable pump, etc., a digital voltmeter is of necessity for protecting the battery of your car. Compact, easy application, fast charging, this USB car charger, useful for charging mobiles, MP3, MP4, laptops and so on, all devices with USB ports, is your best travel partner. Item Specifications: Condition: New Color: Black Material: PC + ABS Input Voltage: 12-24V Output Voltage: 5V Output Current: 3100mA Working Temperature: -40-60 Celsius degree Wires: Red (+), black (-) Color of Light: Just as the picture shown Size of Item: Just as the picture shown Weight of Item: 166g Compatibilities: Suitable for smartphones, cellphones, MP3/MP4 players, earphones, tablet computers, cameras, etc. Application Scene: For cars, vans, caravans, SUV, trucks, motorcycles, boats, etc. Features: 1. Fast charging, stable voltage, current protection, and LED indicator. 2. Three digital numbers displayed on the voltmeter indicating live battery voltage. Package Includes: 1x USB charger 1x Voltage meter 1x Cigarette light socket 1x Switch button 4x Screws 3x connection wires