AmpliVox VHF S1600 - Manual (Page 6)

BELT CLIP
A detachable belt clip is included for convenience. Slide the tapered
end of the belt clip into the grooved area located on the back of the unit
until it clicks into place.
MOUNTING
The receiver can be mounted to some AmpliVox units by means of the
supplied mounting bracket or velcro self-adhesive patch.