Smart IC Technology: Syncwire USB Charger can recognize any device and automatically detects and delivers the optimal charging current for any connected device - ensuring the faster, more efficient charge. Full-Speed Charging Travel Adaptor: 4 Ports (2¡Á2.4A + 2¡Á1A) could max up to a 34W/6.8A output, full-speed charging up to four devices at the same time and automatically adapting the output for each one accordingly. Portable Sized Wall Charger for Travel: the travel adaptor with UK EU US removable adapters is easy to fit into an All-in-One Gadget. Automatic voltage adjustment between 100v and 240v, Small size and easy portability make the usb charger easy to carry along and suitable for travelling. Certified Safe: Syncwire travel plug is approved for UL-FCC-CE certification, the sturdy Polycarbonate shell, the built-in "smart IC" & the thermal material design keep the charger going against overheat and over-load on the unit and over-charge onto the devices. Premium Support: Fast and easy-to-reach Customer Service and 24/7 email support for your peace of mind.