1.THREE CIGARETTE LIGHTER SOCKETS - Three sockets meet enough compatible GPS,dash cam & simultaneous use of a variety of portable appliance in your 12V/24V vehicle.^2.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^3.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^4.Multi-Protect safety system & Long Cable- Built-in Safe fuse and smart recognition chip prevent from over-current, over-voltage, and short-circuit protection, ensure complete protection compatible you and your devices. ^5. 90 degree free rotation using posture by you ,70cm both the front and rear seats can be recharged by extending the power cord.