1) Model: XF310

2) Size: diameter of 52 mm high 40 mm

3) Net Weight: 52 g

4) speaker power: 2. 4 w

5) speaker size: 36 mm

6) signal to noise ratio: not less than 80 dB

7) frequency response: 90Hz - 24kHz

8) Power: Built-in lithium battery

9) lithium battery capacity: 250 mHa (3. 7V)

10) playback time: about 3. 5 hours (depending on the volume and the environment)

11) Charging time: USB adapters about 2. 5 Hours

12) Compatibility: 3. 5 mm 2. 5mm (PC, MAC, CD, MP3, MP4, DVD, PlayStatio, ipod, iphone