The Fire Glow rechargeable portable speaker packs crystal clear sound and surprisingly powerful bass into a portable, compact aluminum casing design. Plug your iPod, iPhone, iPad, smartphone, laptop, MP3 player or other audio device into the 3.5mm audio cable to bring your tunes anywhere. Expandable design for improved sound quality. Made with a Li-ion Polymer Battery with 5 hours of playtime at 70% volumn. 40 hour of standby time with high quality NdFeB speaker driver 4 Ohm/3W. Includes a USB cable for quick charging.