Mini Speaker, Retractable Speaker with USB Charging Cable, 3.5mm Audio Interface Portable Speaker for MP3, MP4, MP5, Mobile Phones, Computers(Black, 12)

【Battery Capacity】Built-in 180mah battery, no external power supply needed, provides one and half hours of playing time at maximum volume, or about 3 hours at 50% volume, 【USB Charging】Comes with an audio cable at the bottom of the speaker. Equipped with a USB charging cable. Unique design -- Retractable speaker, 【Wide Range Of Applications】Suitable for MP3, MP4, MP5, mobile phones, computers and other devices with a 3.5mm audio jack, 【Portable Design】Mini Portable Speaker, Small and lightweight, hook hole design, easy to carry, 【Function Characteristics】Low voltage, low power consumption, power amplifier IC, pure sound quality, low distortion