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 lithium-ion rechargeable battery (included) or 3 AAA batteries (not included).