Note: Item is a Wired in-the-ear headphone without microphone/ button to control volume Powerful, bass-driven stereo sound Provides unparalleled bass sound with balanced and high resolution stereo sound and minimizes the outside ambient noise for better listening Innovative finger-contoured housing design enables for easy adjustment and optimal wearing comfort Optimised for mp3, iPod, iPhone, CD players and portable gaming systems Frequency response (Headphones) - 20 Hz - 20,000 Hz Sound pressure level (SPL) - 110dB (1kHz/1Vrms)