Check the listing for details. Walker's Bluetooth Electronic Ear Muffs Black. Color: Black, Condition: New. Listed at 40.10 USD. The Walker's Bluetooth Passive Earmuffs with Boom Mic offer passive ear protection with the option of connecting to your mobile device through Bluetooth technology. The boom mic is adjustable with a wind screen which gives a distinctively digital clear sound without interference. The Bluetooth Passive Muffs feature an auto shut off a 2, 4, and 6 hours, as well as a new ergonomic head band design for comfort. Powered by two AAA batteries which are included.