AV STAR (HK) Universal Socket / Plug 4x3 Outlets + 2 USB Overload Protector Power Saving for Worldwide Use USA Plug Vertical power socket use hierarchical design which remedy the horizontal socket's disadvantage of encumbrance With Circuit Breaker - For Worldwide Use - USA Standard Plug Lighting and Overload protector,with 2 USB + 4*3 Outlets Its tower design blends seamlessly with today's modern electronics and appliances, while saving valuable space Widely used in famlily,office,store and other public place