NOISE CANCELING IN-EAR VOICE/MUSIC HEADSET WITH MULTIPLE MICS FOR ENHANCED CONFERENCING Listen to music or use your smart phone in practically noiseless comfort with multiple Mics for enhanced conferencing. Compatible with iOS, Android, BlackBerry or Windows phones. Active Noise Cancelling (ANC) In Ear Headset blocks outside noise (90% +) Includes 3 MEMS impedance matched microphones, two cancel out noise and one is for enhanced conferencing so you can take that call on the road and still Hear and Be Heard. Use in passive mode to save battery, or if the battery is out. Uses AAA Batteries and has about 20 hours of powered listening. A Mon button temporarily suspends Noise Cancellation - So you can hear someone talking to you.