HOTT Portable Bluetooth Wireless SpeakerSmall Outdoor Stereo Speaker with Power Bank 4500mAh, 24-Hours Playtime, Enhanced Bass, Built-In Dual Driver Speakerphone, Supports Large Volume.(S303) [Bluetooth Technology ]: With a 33-foot wireless range for iPhone, iPad, iPod, Mac, smartphone, tablet, Windows 7,8,10, car and other compatible bluetooth devices, this wireless portable bluetooth speaker offers a stable and fast bluetooth connection. It can also be wired to PC, TV and other non-bluetooth devices via a 3.5mm audio cable. Also, you can receive and take crystal clear hands-free speakerphone calls with built-in microphone. [Long playing time]:Built-in Li-Ion 4500mAH Rechargeable Battery for up to 20 hours of playtime. The built-in rechargeable battery enables a breakthrough 20-25 hours of playtime. So you can jam through a full day and still play your nighttime-ambiance soundtrack. Shockingly, it can also act as a charger for your iphone and smartphone, charging while playing music. [Larger volume & enhanced bass]:With 5W*2 speakers, The small speaker provides rich bass without distortion, even at highest volume, it streams incredible stereo sound with full range output, enables powerful, crisp, bass rich music.Enjoy a High Definition stereo sound with a impressive volume whether you're lounging around the house, or partying, walking out, camping, hiking, biking. [High quality sound output]: 3D surrounded enhanced Bass, low harmonic distortion, through dual high-performance drivers and passive subwoofer. This bluetooth speaker let you enjoy crystal clear and incredible sound. [Portable Design]: Small and stylish appearance, you can easily take it to all kinds of outdoor activities. GUARANTEE:Our products have been strictly tested before delivery. No matter you encounter any problems during use, please feel free to contact us.We will deal with them immediately and give you a satisfactory reply.(30 days return for no reason, 1 year free warranty).