Pavoi Stereo Wireless Bluetooth 3.0 Speaker Enhanced Bass Resonator Rechargeable Portable Speakers with 8 Hours Playtime for Iphone iPad iPod Android Phones and MP3 Players (Black) Incredible sound quality surprising enhanced bass realized through a 5W driver, top CSR Bluetooth chipset, distinctive Cavity Design and the enhanced bass resonator.Compatibility-All devices with Bluetooth enabled.Others without Bluetooth use 3.5mm audio cable. Music of High Quality-Provided with echo and noise cancellation technology, the incredible enhanced bass resonator makes you enjoy perfect stereophonic and bass sound in all directions. You can hear heavenly music even outdoors! Bluetooth 4.0 Version Technology-EC Technology latest Blutooth 4.0 speaker intends to replace the cables connecting, up to 33 feet super smooth and clear connection range, releasing you from connection limitation. Extremely fits for your phones and devices equipped with Bluetooth technology. Ultra Portable & Rechargeable-Small sizeL 2.5inchW 2.5inchH 2.75inchNo matter where you are,in the car,outdoor or travel.No problem,it's easy to carry with. Ultra-long Battery Life-The Built-in 500mAh Li-ion battery only needs 2- hour charging. 8 to 12 hours wonderful playtime, meets your daily demands indoor or outdoor to enjoy this speaker completely.