The AKG Acoustics WMS 61 (VHF) and WMS 81 (UHF) wireless systems offer specialized features such as interchangeable microphone elements for optimum flexibility Users (both VHF and UHF) can choose between 15 selectable settings, a helpful tool for solving interference problems in areas with crowded (frequency) airspace. Also, as many as 20 systems can be operated simultaneously. In addition, there is a battery status display, switch covers on the transmitter for operation outdoors, a tone code squelch for interference-free transmission, and a rackmount kit included with all systems. Among the optional accessories are the PS 61/81 active wide-band antenna splitter, an external receiver antenna, and a hard case for complete system protection. AKG Acoustics Nashville, TN