The amplifier is designed to amplify the signal transmitters radio R-105M, R-108M, R-109m, R-107 and related (and thus increasing the range of about 2-fold relative to the work radio without enhancer), both in stationary conditions field as well as in movement when mounted on a vehicle.

In relation to the amplifier UM-1 is a more modern, smaller and lighter, has a broader frequency range, but also with lower output.