1.THREE CIGARETTE LIGHTER SOCKETS - Three sockets meet enough for GPS,dash cam & simultaneous use of a variety of portable appliance in your 12V/24V vehicle. 2.On/Off Switch A main switch of the device and separate on/off switch for each socket. Just press the button to turn on or off, no need to plug in and out your devices, expanding lifespan of the device and saving energy. You can concentrate to drive, prevent distraction from other things. 3.Smart USB Ports - 2-Port USB charging ports with 3.1A total output enables you to rapidly charge 2 devices simultaneously. with built-in Smart IC technology that can intelligently detect your devices to deliver its fastest possible charging speed 4.Independent Power Switch & LED Voltage Display- 3-hole independent switch with one button can cut off powerenergy-saving and devices protection. Monitor battery voltage in real time to protect the battery, prolong the service life of battery 5.Flexible and Movable Place the Car Charger Splitter wherever you like with the sticky detachable mount, the extension power cord would be especially helpful when passengers in the back seat also need to charge their phones.