Universal Power Tower 4 Outlets and 8 USB - 100v to 220v/250v and 2550 Watts Surge Protector - With Circuit Breaker - For Worldwide Usa Plug 4 International World Sockets Support: United States, Great Britain, Canadian, South American, Middle Eastern, African, Chinese, Hong Kong, Singapore, Australian, and 150 more countries devices. usa plug 8 Universal USB ports (8.6A total) auto-adjust charging rate for all of your tablets, smart phones, & digital cameras. Supports: simultaneously charge 8 different USB 1A devices or 4 different USB 2A devices. All Sockets/USB ports are grounded & provide superior protection from power surges, spikes, and damaging voltage fluctuations. Premium quality circuitry & professional quality fire-retardant material ensure life-time safety and reliability. Each charge station block features an individual ON/OFF switch.