IDEAL FOR DIGITAL DEVICES SUCH AS IPOD(R)\, MP3 & CD PLAYERS; NOISE REDUCTION LEVEL: -12 DB ± 2 DB; HIGHLY EFFECTIVE NOISE-CANCELING CIRCUITRY ENHANCES AUDIO SOUND QUALITY IN NOISY ENVIRONMENTS; BUILT WITH HIGH-PERFORMANCE SPEAKERS FOR EXTENDED FREQUENCY RANGE & LOWER DISTORTION; FULLY-CLOSED EAR PIECES DELIVER MAXIMUM SOUND & EFFICIENCY; NOISE-CANCELING FUNCTION WITH INDICATION & ON/OFF SWITCH; BUILT-IN BELT CLIP FOR EASY ACCESS TO CONTROLS; UP TO 60 HOURS OPERATING TIME WITH 1 AAA BATTERY (NOT INCLUDED); INCLUDES CARRYING POUCH & EXTRA EAR TIPS