Freegoing 3 Socket Car Cigarette Lighter Adapter DC Outlet Car Splitter with 2-port USB Car Charger Adapter and Digital Display (Red) Intelligently identifies and safely charges your personal electronic devices with the Built-in high safety standards Self-healing Fuse & Smart IC Monitoring your Car Battery by the LED meter freely Dual Smart USB charging ports: Automatically detects your devices to deliver its fastest charging speed up to Max 3.1A in total. Intelligent car battery voltage detection with red digital display. Each socket comes with blue light when the power is on Keep your Car Neatly & Tidy with the built-in cable winder