LINK 2.0 Helmet Mount DEFY Slim Passive is the

DEFY Slim Passive is the ultimate earmuff for distraction-free

Ventilated polyester mesh back

and a background noise-dampening microphone

These easy-to-use earbuds now feature up to 11 hours of battery life

Bluetooth compatibility

LINK 2.0 Helmet Mount DEFY Slim Passive is theISOtunes LINK 2. 0 Helmet Mount is the ultimate solution for professionals in need of both head and ear protection on the job site. Equipped with Bluetooth connectivity, up to 50 hours of battery life, and an optional boom mic attachment, LINK 2. 0 HM is perfect for all day wear in any environment. Universal clip fits a wide range of safety helmets. See FAQ below for a list of certified helmets.