The wireless handheld transmitter shall operate in the UHF band and shall provide a tone key (32,768 kHz) to increase reliability and to minimize un-wanted 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 set-ups shall be available to ensure that multiple sys-tems in use do not interfere with one another. The transmitter shall be programmable through a menu as well as infrared synchronization (including the sync of free programmable custom groups). The transmitter shall provide exchangeable micro-phone capsules as well as a backlit LC display showing name, battery gauge, carrier frequency, gain and lock settings. LCD menu controls should cover adjustable audio gain, tunable carrier fre-quency, switchable RF power, and frequency and power lock settings 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 or 10/50 mW switchable* Gain Adjustment Range: 30 dB Battery Life: > 8 hours (10 mW setting) Housing: Aluminium Overall Dimensions (L x D): UR2/SM58: 253 x 51 mm UR2/SM86: 246 x 51 mm UR2/SM87: 245 x 51 mm UR2/BETA58: 251 x 51 mm UR2/BETA87A: 246 x 51 mm UR2/BETA87C: 246 x 51 mm UR2/KSM9: 253 x 51 mm Net Weight UR2/SM58: 354 g UR2/SM86: 316 g UR2/SM87: 313 g UR2/BETA58: 314 g UR2/BETA87A: 323 g UR2/BETA87C: 323 g UR2/KSM9: 365 g *countrydependant