Caldwell E-Max Low Profile Electric Hearing Protectant: * 2-cup headset with a microphone in each cup * Amplifies sounds below 85 decibels to normal range * Shuts off for a split-second for sounds above 85 decibels to protect hearing * Provides true stereo sound and allows user to identify sound"s directional source * Requires 2 AAA batteries (not included) * Dimensions: 4"L x 9"W x 10"H * Model# 487-557