Rocksteady XS Portable Bluetooth Speaker (V1.5) Loud and Clear - The loudest and clearest portable speaker in its class. No speaker available under $200 can match its sound, performance, or durability. And no speaker under $200 can match its value. 10 hours per charge - Micro-USB charging port, so there is no need to carry around heavy charging plugs and proprietary cables. 10 hours of playback per charge, and expandable to forever thanks to the ability to replace your battery on the fly. Easy connection - Guaranteed to connect to your Smartphone or Tablet. Or connect using the supplied 3.5mm cable from your device's headphone jack. Also featuring a USB Port for MP3 Playback directly from a USB Drive. 2.1 Stereo Surround Sound: Side facing speakers and a Subwoofer makes the Rock steady XS the only portable Bluetooth speaker to deliver a true Stereo Surround sound. Party Mode - Connect two devices at the same time. Play one track from one phone then switch to the other phone on the fly. Loud and Clear The developers if the Rocksteady XS listened to customers who wanted a portable Bluetooth speaker that was loud enough to handle almost any situation, yet clear enough to play distortion free at higher volumes.^Lithium Ion Battery The Rocksteady XS uses a high quality Lithium Ion battery, giving you over 10 hours of continuous play.^USB Port for MP3 Playback or Device Charging With the USB port, you can either connect a USB thumb-drive to play MP3 files or connect the supplied micro-USB charging cable to charge your device external device.^Built in Speakerphone With a high quality built in microphone, you can now use your Rocksteady XS as a portable speakerphone.^Crank Up your Computer or Laptop.The Rocksteady XS is loud enough to blast sounds from your favorite tunes or movies on your computer or laptop.