Charging Ports with overload protection protects against spikes and fluctuations. Surge Protector Power Strip with usb- 2 sets of outlets arranged on different directions, Built- with smart technology, detecting charging devices and deliver optimal charging speed automatically, compatible with Kindle and most USB devices. 12 AC Surge Protector Outlets- The 3 level complementary Surge Protector Circuit which composed of TVS (transient voltage suppressor), MOV (metal oxide varistor), GDT (gas discharge tube), with minimum 2700 Joules energy absorbing capacity, could protect your devices much more quickly and reliably than other brands 1 level MOV Surge Protection Circuits. Safety and Certificate- ETL safety certified, with extension cord and other major components certified by UL. The over current protection switch limits the power strip's working current to certain setting, so it will not get hot during usage. Environmental protection and fire-resistance PC shell with flame retardant at 1382 makes it more durable and longer lifetime. What You Get- Tcstei Power strip, Maunal, 30-day return, our worry-free 12-month, and reliable customer service will respond to you within 24 hours.