Portable Mini Speaker USB Wired Small Speakers with 3.5mm Aux Input Jack, Travel Speakers for Laptop Computer MP3 Player Speaker for Mobile Phone, MP3, PC | Travel External, For Laptop Computer MP3 Pl

Expandable Design: This portable speaker features a retractable resonance chamber. Sound waves resonate within the chamber to produce a more powerful bass effect. 3.5mm Audio Jack: This mini speaker is compatible with MP3, MP4, MP5 players, cell phones, computers, and other devices equipped with a standard 3.5mm audio jack. Built-in Battery: This low-power speaker contains an integrated 180mAh battery, eliminating the need for an external power source. It offers up to 1.5 hours of playback at full volume, or around 50 hours of playback at 3% volume. Included Cables: The speaker is supplied with an audio cable located at its base, plus a USB charging cable. Easy to Carry: Measuring roughly 5 cm (2 inches) in length, the speaker is compact and lightweight, making it a superb audio player choice for both indoor and outdoor use