Etymotic ER 4P Micro Pro Reference Earphones

The Etymotic ER-4P MicroPro earphones are the next best thing to live music, with noise isolation far surpassing that of active noise-canceling earphones. The Etymotic ER-4 require NO batteries and can be plugged into any audio source. Their external noise exclusion -- 35 dB with 3-flange eartips, 42 dB with foam eartips -- allows you to hear the full dynamic range of recordings without having to play them at unnaturally high and unsafe levels.

Features:

• 5 ft. cord with 3.5 mm stereo phone plug 
• 1/4 inch stereo phone adapter plug 
• Six 3-flange eartips 
• 10 foam eartips 
• Filter changing tool  
• 4 replacement filters 
• Shirt clip 
• Pouch 
• Storage box