Portable Small Usb Speaker

The speaker has an audio cable at the bottom and also comes with a USB charging cable. Retractable design, the speaker is small, light and easy to carry. Low voltage, low distortion, low power consumption, provide you with pure sound quality. The small speaker is suitable for MP3,MP4,MP5,mobile phone, computer and other devices with 3.5mm audio jack. Built in 180mah battery, no external power supply, can play for one and a half hours at maximum volume, and about 3 hours at 50% volume