SUPER POWER 4USB OUTPUT *HIGH QUALITY WIRE FIRE PROTECTION SHELL PLUG 6000 TIMES IS NOT LOOSE *SAFETY INSURANCE，FOUR DOUBLE 2.1A USB OUTPUT CURRENT *SINGLE HOLE CAN NOT BE INSERTED INTO THE SOCKET，THE PANEL LOCK SAFER *SUPER SWITCH，TOUCH MORE CONVENIENTLY PROTECTION AGAINST ELECTRIC SHOCK ANTI TONG PLUG *THE BUILT-IN HIGH PERFORMANCE STABILIZERS，USB EQUIPMENT MORE STABLE