Black USB Micro SD/TF Music Angel FM Radio Player Mini Speaker for iPhone4 iPod MP3 PC Powered By: Built-in Battery Charged By: USB Ports Total Output: 3 watts RMS x 2@10%25 THD Frequency response: 150-18000hz(3db) Signal and noise radio80db Loudspeaker: 1.77inch drivers Magnetic resistance 4 Ohms Line in/Line out: 3.5mm Headphone Jack Power supply: 5V/1000mA Color: Black Supports: Micro SD Card, USB Flash Drive & Aux Cable connected to iPod, iPod Touch, iPhone & any music player Size: 15.7cm x 4.8cm x 4.8cm Package Included: 1 x Black Music Speaker 1 x USB Charging Cable 1 x Aux Cable