For HMT-1Z1. Intrinsically safe (IS approved) for use with the HMT-1Z1 in hazardous locations. Needed to mount the HMT-1 when wearing a bump cap or baseball cap.
Supports greater maneuverability and mobility and ensures superior fit and positioning of the device over a wider range of head sizes and shapes. The Tri-Band Strap replaces the standard overhead Strap for a more secure fit.