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16Universal USB ports (16.6A total) auto-adjust charging rate for all of your tablets, smart phones, & digital cameras.
Supports: simultaneously charge 16 different USB 1A devices or 8 different USB 2A devices.
All 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.
AC 110-250V voltage with each tower block featuring its own individual ON/OFF switch.