SHARKK Boombox+ Bluetooth Speaker Advance MaxxBass Technology 20W Portable Wireless Speakers Bluetooth 4.0 speaker Stereo with Mic ADVANCED MAXXBASS TECHNOLOGY  These Bluetooth speakers come with Advanced MaxxBass Technology and 2 10W speakers giving it a combined output power of 20 watts for booming clear sound that rivals Beats and Jambox for half the price! BATTERY LIFE & MICROPHONE  With one full charge the 4400mAh lithium-ion battery will last for 12+ hours. LED indicators let you know when the battery needs to be recharged. The built-in microphone works for hands-free phone calls for Apple iPhone and Android devices. DARK ROOM DISPLAY  Built-in sensors automatically illuminate the buttons so you can play and pause, adjust the volume, answer phone calls and more in a dark room. CONNECTION & RANGE  Connect your iPhone or Android device via the Bluetooth 4.0 or NFC. The Sharkk Boombox has a connection range of up to 30 feet. INCLUDES  Boombox+ 20 watt portable Bluetooth speaker, charger, manual and carrying pouch.