Powermatic USB 4 Outlet CE4G – Dual USB Charger: The built-in Smart IC Technology for mobile/tablet charger, automatically detects device manufacturer/model and then automatically assign maximum needed charging current; making it capable of charging all mobile devices and tablets etc. A total 2.5 Amp charging current, it is equipped with Output Short Circuit Protection and Over Current Protection universal USB charger that lets you charge most products in the market. Protect your Devices from Surge and Spikes: This product is equipped with Surge protection device to protect connected equipment from 1 type of power disturbances (Surge).