SoundBot&reg; SB521 HD 3D Bluetooth 4.0 Wireless Speaker for 15Hrs Music Streaming & Hands-Free Calling w/ Passive sub woofers,5W + 5W 50mm Driver Speakerphone, Built-in Mic, 3.5mm Audio Port, Battery EXHILARATING - Dual membrane of 5W + 5W HD loudspeakers on both ends of speaker to reproduce potent bass, dynamic mid-range and crispy high notes to deliver enhanced HD music listening experience. UNIQUE - One of a kind premium stainless steel brush metallic finish with passive sub woofer on both ends for both active outdoor and indoor use. SENSORY TOUCH CONTROL - LED backlit touch sensory control buttons with sleek, stylish and modern design. TECHNOLOGICAL ADVANCED- Stream music from up to 33 feet of remote distance. Built-in 3.5mm AUX audio line-in and 1500mAh rechargeable battery allows SB521 to connect to media devices WITH OR WITHOUT Bluetooth capability. SOLID PERFORMANCE - Connect with Android, iPhone, iPad, tablets, smartphones, iPods, MP3, MP4, radio players, and other Bluetooth enabled digital players or media devices with aux port. 100% risk-free 1 year manufacturer warranty included for purchase made from authorized resellers.