Color: silver Micro SD/TF card slot， USB port， 3.5mm jack Built-in lithium battery charged via USB cable Built-in high sensitivity FM radio Output power: RMS 4W (2W+2W) THD=10% Frequency responce: 150-18000HZ (+/-3dB) 3.5mm stereo jack fits MP3， MP4， CD， DVD， iPod， cell phone， PC， etc. It's a standalone music player with its own booming speaker system capable of pounding out beats by the likes of Public Enemy， "Don't believe the hype it's a sequel， as a people..." or listen to Nas's New York State of Mind...this is the mini portable speaker to get if you know what good music is and you enjoy listening to it. When you're done with the hiphop， switch up and listen to Diana Ross and the Supremes， "you can't hurry love， you just have to wait..." The tunes are infinite， but the good ones few. Listen to them on this. Note:Press MODE key to switch modes after powering on. There are 3 modes including SD， FM， and AUX (play music from computer by a 3.5mm cable).Please pull out the antenna on FM mode. Press Previous or Next key to search signal. The music from FM will be played when signal is detected. Functions: 1. Insert the card to play its music files. 2. Connect a Flash Drive to play its music files ( only for MP3 format ).3. Support FM radio. 4. Frequency can be displayed.5. With LINE IN function. 1 x Speaker 1 x USB cable 1 x Audio cable In blister package