For HMT-1 and HMT-1Z1. Intrinsically safe (IS approved) for use with the HMT-1Z1 in hazardous locations.
The Overhead Strap is the standard head strap that comes with the HMT-1 and HMT-1Z1, and is worn with the device when a hard hat, bump cap, or Tri-Band Strap is not used. With regular use, wear and tear of the strap is normal and it is designed to be replaced periodically.