For reporting the events or the opportunity to wear, without confusion or shock, two boxes (or two objectives with collars) - one on each shoulder - is also a big plus.
One can criticize his price, of course, but it really is a must.
PS: Another significant advantage not necessarily, a propensity to attract the least attention potential thieves: the strap is not "branded" (unlike the original ones - especially for pro devices with the name embroidered in large model above), and the unit brought against the hip is more discreet than worn on the belly).
