Shark Radio Headset Kit - Fits Half-Face and Full-Face Motorcycle Helmets - Compatible with Cellphone, MP3 Player, GPS, Tablet and More - Model Shklxh1, Black Designed Specifically for Outdoor Biking and Cycling Conditions Blocks out Wind and Noise in Extreme Road Environment Quick-release Feature - disconnects all around for safety Dual Sided for increased sound and clarity Impedance: 32 ohm, Sound pressure level: 90dB