Beats Sutdio Headphone (JSR-EP45) Feature: High sound quality stereo headphone for iPhone & MP3 player with design for super fashionable style. 1, Extra large speaker drivers for supper deep bass 2, High powered digital amplifier plays hip hop, rock, R+B and more loud, without distortion. 3, Technology actively cuts external noise. 4, Exactly the same as the original 5, Super wearing comfort, High quality Hands-Free stereo Headphone. Specifications: Frequency response 20-20, 000Hz Speaker size: 40mm Impendance 32 ohms Rated power 10mW Plug 3.5mm stereo Sensitivity 108dB Cable length 1.3m.