The E-Max Pro BT with Alkaline Batteries are newly designed from Caldwell, featuring high quality Bluetooth hearing protection with an all-day comfortable fit all at an affordable price. These E-Max are Bluetooth compatible with mobile devices and have a 24dB noise reduction rating. With high quality stereo sound and easy to use push button volume controls, you can listen to all your favorite music while on the range. Runs on (included) AAA batteries. Product Features BLUETOOTH COMPATIBLE WITH MOBILE DEVICES WITH EASY TO USE PUSH BUTTON VOLUME CONTROLS 24DB NOISE REDUCTION RATING - HIGH QUALITY STEREO SOUND COMPACT FOLDING DESIGN WITH LOW-PROFILE DESIGN FOR UNINTERRUPTED CHEEK WELD ILLUMINATED ON/OFF INDICATOR - AUTO-SHUTOFF (4 HOURS WITHOUT TOUCHING CONTROLS)