The wireless bodypack transmitter shall operate in the UHF band and shall provide a tone key (32,768 kHz) to increase reliability and to minimize unwanted noise. The system shall allow to change the operating frequency in 25 kHz steps in order to avoid RF interference, enabling up to 47 systems to operate simultaneously in one frequency band. Preconfigured group, channel and frequency setups shall be available to ensure that multiple systems in use do not interfere with one another.
The transmitter shall be programmable through a menu as well as infrared synchronisation. The transmitter shall provide a threaded connector to securely lock microphones or instrument cables.  The backlit LC display shall show name, battery gauge, carrier frequency, as well as gain and sensitivity settings. The LCD menu controls should cover separately adjustable gain (-10 to +20 dB) and input sensitivity (attenuation pad: +15, 0, -10 dB), tunable carrier frequency, switchable RF power, frequency and power lock as well as the access to the RF Safety Mode (transmitter operation with muted RF carrier). 
  
RF Carrier Frequency Range: 518 – 865 MHz*
RF Output Power: 10, 10/50 or 10/100 mW switchable*
Maximum Input Level: +10 dBu
Gain Adjustment Range: 55 dB
Battery Life: > 8 hours (10 mW setting)
Housing: Cast magnesium
Overall Dimensions (L x W x D): 98 x 60 x 17 mm
Net Weight: 97 g (without battery)

* countrydependant