Reviewed as Sound & Vision magazine's "the world's best travel speaker", DASH7 is musical, powerful, weighs only 7.1 oz. and is oh-so-thin. In fact it's the slimmest lightest high-performance wireless speaker in the world. It's also a speakerphone. Soundmatters didn't invent the Bluetooth speaker, but in 2008, they invented the first one good enough for an audio purist; it along with the iPhone, was named a TIME magazine Top 10 Gadget of the Year. With patented innovation upon innovation, their newest generation of pocket-sized portable speakers provide clarity & sound quality (including bass) the big brands can't match. DASH7 lets you enjoy your music wirelessly, with extended Bluetooth range, or connected via included audio cable. Charge via standard "cellphone" microUSB or included high-power int'l charging kit. DASH7 is engineered around the newest & most advance version of Soundmatters' legendary patented Twoofers (tweeters that also woof). These pancake-flat ultra powerful neodymium drivers provide a uniquely wide frequency range & are augmented by a patented rechargeable Bass Battery which not only delivers up to 12 hours of playback, but augments the Twoofers (by ingeniously doubling as a passive bass woofer). The result - over 8 octaves of music reproduction (for spec-hounds, that's 70Hz-20kHz +/-3dB at0.5m). Also, power wattage doubles when wall-connected using included hi-power international charging kit. DASH7's Bluetooth echo/noise canceling microphone provides clarity to your calls. Answer, terminate, reject, or transfer a call back to your phone all from your DASH7. For a full movie experience, it fires sound up, nesting in front of your tablet (without blocking the screen) ... or provides Omni-directional sound anywhere. For critical high-resolution listening. The included case turns into an angle speaker stand, aiming DASH on-axis with your ears for highest resolution.