The RTS Model LMS-325 Line Monitor Speaker Station is an amplified, modular speaker that can be used to monitor one (1) or two (2) intercom or program channels. It features 5 watts of drive power and includes a wide range 8? speaker. The LMS-325 is in the standard 1 RU (Rack Unit), ? rack width form factor of other RTS intercom products, including the RM-325 Intercom station, the MRT-327, MCE-325, SSA-324 and others. A large variety of mounting options and hardware are available to suit any application.