Introducing OB–4 by Teenage Engineering, the portable high fidelity loudspeaker with two 4'' bass drivers and a pair of neodymium tweeters that deliver crystal clear, open natural sound with 38 watts per channel — that's around 100 decibels of incredible sounding stereo. Listen using line input, bluetooth, FM radio and disk. The interface is minimal, with only the things you really need. Yet if you look below the surface, there's a lot more than meets the eye. OB–4 memorises everything you play on an endless looping tape, so you can rewind the radio and remix anything, all in OB–4. - Dimensions: 32.5cm x 25.5cm x 8.0 cm - Bluetooth, analogue radio, line in - 3.5 mm mini-jack input, Bluetooth - 2.4kg The Magic Have you ever wished you could instantly rewind when listening to the radio, to hear the title of the song just played? OB–4 continuously memorises everything you listen to on an endless looping tape (up to 2 hours). Rewind, time-bend and loop at the flick of your fingertips. on purpose or by accident. Instant rewind on radio is just one of the OB-4's magic tricks. Natural Sound Four tailor-engineered speaker elements deliver pure quality sound and a stereo field that fills the entire room. A flow-optimised bass reflex duct delivers deep natural bass. Motorised User Interface Use your fingers to grab, spin and interact with the sound. Digital-motion controlled volume knob and tape reel. Battery Life The high capacity lipo-battery delivers about 8 hours of noise at max volume, or an average of 40 hours on a single charge. * Please note this is powered by a US plug and requires a converter to be used for UK or EU sockets.