Color: fuschia Output: RMS3W THD= 10%Frequency response: 150- 18000HZ SNR: more than 80dbSize: 1.77 inch (outer diameter 45mm )Magnetic resistance: 4 ohmsPower supply: 5V/550mA battery LINE IN/5V: powered by USB， audio input Support USB， Micro SD / TF card Features:1. Built-in lithium battery2. DC 5V power adapter and USB power supply available3. ON / OFF switch 4. Support Micro SD card 5. Earphone function 6. Powered by USB or DV 5V adapter How to use: Please connect the 3.5mm plug to the audio jack of your computer or phone while accepting music files. Connect MINI USB to the LINE IN/5V of speaker. Slide the on/off switch to ON position. Blue LED turns on. Press and hold "play/pause" button for 5s untill the blue LED flashes. Now the music files can be played. TF card only support MP3 format music， when inserted with TF card， 3.5MM audio port connected with devices， you could press play/pause button 3-5 seconds to change the mode.The keys doesn't work in the LINE IN mode. You need to set volume on the playing devices， such as Previous/Next， Play/Pause key.1 x Speaker 1 x USB cable ( with 3.5mm audio plug )1 x Lanyard 1 x User manual In original package