Persistence Mini Portable Travel Loud Speaker with 3.5mm Audio Cable Low Voltage Built-in Battery Retractable Speaker for

Low voltage, low power consumption, power amplifier IC, quality, low distortion Comes with an audio cable at the bottom of the speaker. Equipped with a USB charging cable Built-in 180mAh battery, no external power supply required, offers one and a half hours of at maximum volume or around 2 hours at 50% volume design - retractable speakers. Small and light, hang hole design, easy to carry Suitable for , MP3, MP4, MP5, cell phones, computers and other devices with a 3.5 mm audio jack