Open back, around ear design
Powered by proprietary Sennheiser 38mm, 50-ohm transducers and frequency response is 12 to 38,500 Hz
Soft, replaceable ear pads for enhanced comfort.Sound pressure level (SPL) 106dBSPL (1kHz/1Vrms)
Two cables included, 3m detachable cable with 6.3mm Jack and 1.2m Detachable cable with 3.5mm Jack
Two year warranty when purchased from an authorized Sennheiser dealer