Feature●Small and lightweight, hook hole design, easy to carry.●Low voltage, low power consumption, power amplifier IC, pure sound quality, low distortion.●Suitable for MP3, MP4, MP5, mobile phones, computers and other devices with a 3.5mm audio jack.●Comes with an audio cable at the bottom of the speaker. Equipped with a USB charging cable. Unique design ‑‑ Retractable speaker.●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.Description