Universal enclosure for installation of GSM/GPRS communication modules etc. Its increased height (volume) makes easier access to the connectors and wiring. It can also be useful where you have to leave some extra length of wire coiled at a device installed in the enclosure. OPU-2-B is provided with a tamper switch that reacts to opening. A special bracket enables mounting of ANT-GSM-I or other antenna models with SMA connector, e.g. ANT-GSM-E, ANT-OBU-Q, ANT-900/1800.