The Urbanears Plattan Headphones Designed to be "the perfect classic headphone," The Plattan combines innovative functions and performance with today's technology. A full-size headphone that allows full, rich, secluded and clear volume, sound and thumping bass (112dB, 20kHz), The Plattan furthermore folds down to the size of a fist for maximum mobility and convenience. Featuring Urbanears' patented Zound Plug, invite a pal to plug in and thrash along to your tunes. Microphone and remote compatible with iPhone, Blackberry, HTC, Nokia and most other devices. 40 mm Handmade driver unit. Frequency response: 20-20kHz. Impedance: 32 ohms. Sensitivity: 112dB. Max input power: 40mW. 47" Fabric cord. 3.5 mm Stereo plug. Zound Plug. Hinge construction allows the headphone to fold down to a fraction of its size. By Urbanears.