1.DIY Four Hole Panel Base: lighter plug+ Voltage display +Dual USB+ Toggle Switch.Small size and excellent performance.Easy to install, convenient to use.Universal fits for 12V Vehicle, Motorcycle, ATV, Boat, Car or Ship. 2.Dual USB output design allows it to charge 2 USB devices at the same time to save your time.USB Charger widely used for electric equipment power supply, such as Vehicle,GPS, mobile phone, camera, mp3. 3.Intelligent circuit design protects against excessive current, overheating, and overcharging. the charging safety. 4.Toggle Switch:Easy to control and with the red light to remind people when the switch on. Multifunctional product, perfect for travel use. 5.With Multiple Protection Function: Build-in identification resistor, Reverse polarity protection, over current protection, over temperature protection, short circuit protection. A for protecting your device from damage. Item Type: Lighter Special Features:4 in 1 charger save time Model Name:Dual USB+ Lighter+Voltmeter+Switch Year:Universal Dual USB Port Working voltage:12-24V Dual USB Port Output current:3.1A Dual USB Port Output voltage:5V Voltmeter Display Range:6-24V Lighter Socket Working voltage:12-24V Lighter Socket Output voltage:12-24V Operating temperature: - 40 ° C to 80 ° C Style: green light Material:PC colour:Black Package Contents: 1 * Lighter Socket Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.