Multiple functions & compatibility -- This cup charger could be used as a dual USB car charger with 2 cigarette lighters. 4 outlets create the perfect charging hub on the go for you as well as your family members. It is available for GPS, dash cam, SatNav, heater or other portable appliances in your vehicle. 2 standard USB ports support for 7 plus 7 6S 6 Plus/iPad Air Mini, Galaxy S8 plus S7 S6 edge S5Tab, Nexus 5X 6P, LG, , Moto, and other USB devices Independent On/Off Switch for Each Socket -- No need to plug in and out your charger, reduce wear and tear, expanding lifespan of the device. Note: If your car's 12V/24V outlet stays on after the key was off, pls unplug or turn off all the devices after shutting off the car Digital LED displays the voltage of the vehicle's car battery.Switch on/off - easy to control your cigarette lighter. The LED display can monitor your car battery. When car voltage is less than 12V, it warns with flashing number on the display 2 port output with industry-leading 15W / 3.1A power can charge up to two of your devices simultaneously and rapidly. Colour:black Material:ABS Package Contents: 1 * Dual USB Car Cup Charger Holder 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.