Eikon RM3000EK PLL UHF In-Ear Wireless Monitor SystemThe system allows switching between mono or stereo mode for all the needs of live musicians, actors or speakers. The integrated limiter guarantees an optimal level of protection and a uniform sound reproduction, without distortion, with a frequency response between 50Hz and 15kHz. Specifications TRANSMITTER RF Frequency Band 863 ~ 865 Mhz or 673 697. 800 MHz(A version) Channel depending on Frequency version Oscillation Mode PLL Sinthesized Frequency