A (R)evolution of the Headphone through thelLatest Research in DSP TechnologyDSP sound optimization, including an algorithm for both frequency and impulse response. Bluetooth 4.0 technology with aptX® Codec – no cables, no chaos (includes a 3.5mm by-pass cable). NFC that pair your headphones without hassle. Built-in microphone to work as headset. Large battery, 14 Hours of continuous playback at full volume. Works with all Bluetooth devices; Smartphones, Tablets, PC & Mac computers. Lightweight (170 g) and rigid construction. 40 mm Neodynium high quality driver in a closed construction.