3 Port Smart Phone Charger with Speaker. ORGANIZE / Charge any 3 portable media devices including phones simultaneously in one location. CHARGE / SCD (Smart Current Detection) adjusts the current flow to ensure proper charging to each device. PLAY / Display and listen to one device on Dok's speaker system while charging. UNIVERSAL / Compatible with any smart device. SPEAKER SYSTEM / Plays a device through its speaker while charging. Compatible cradle for Smart phones and MP3 players Holds up to 3 devices while charging in cradles High Quality Speaker System to Play Smart Devices Surge protection built-in Tidy-Cable organizer feature 4W output power Power ON/OFF switch Power ON/OFF indicator AC 110V/50Hz AC 240V/60Hz AC Power (UL Approved)