Thanks to a clever compact version of KEF's legendary Uni-Q "point source" driver array and a powerful bass radiator, the MUO fills the room with stunningly accurate sound whose HF definition and LF extension far exceed the limits of ordinary portable speakers. Along with the sophisticated digital-to-analog converter and other high order internal components, these innovative drivers are mounted within an immensely rigid inner molding encased in an acoustically inert aluminum shell. Streaming your tracks via Bluetooth aptX, you'll be astonished by the sweet, natural treble, fluid midrange and clean, tightly controlled bass. Synchronize a pair of MUO speakers for superb CD-like quality stereo reproduction or select "dual-connect" party mode for large gatherings, so that everybody experiences the same superlative full-range response. Smarter still, MUO automatically optimizes its output to suit upright or horizontal positioning, so you always enjoy the same remarkable acoustic depth and definition. With most Android mobile devices, you can also benefit from the NFC "tap-to-pair" function - just hold the device against MUO and they're paired ready to stream your music in seconds. When not streaming your music wirelessly, connecting to any computer or mobile device via the 3.5 mm Aux input is equally simple. MUO has a rechargeable battery with long hours of play time, and switches itself off automatically when not in use to prolong battery life.