ISmart USB Ports - Internal Smart IC technology intelligently detects your devices to deliver the optimal charging current and speed for any connected devices. (Max 5V,2.4A) 3-Sockets Cigarette Lighter Spliter -- Three 12V/24V cigarette lighter sockets provide a total power up to 120W, enough for simultaneous use of a variety of portable appliances, like Garmin GPS, dash cam and FM transmitter. Safe Power Switch with LED Voltage Display - Designed with on/off power button for energy-saving and devices protection. The LED display of automotive socket extender helps monitor your car battery, when the voltage is under 12V, warning with flashing number on the display High Safety Standards -- built-in PPTC auto-recovery 7amps fuse and protective circuits prevent the product and your devices from overloading or short-circuiting, uninterrupting performance of navigation and media streaming. Car charger rubber grip for stable charging contact. Certified by RoHS, CE & FCC Compact and Humanized Design -- 3.3ft cable is convenience for your family and friends in backseat. 7 in 1 design makes your car more neater.