Shure SLXD14E/153T S50, Digital UHF Wireless System, Frequency range: 823 - 832 MHz and 863 - 865 MHz, With beige MX 153 ear hook microphone, Microphone polar pattern: Omnidirectional, 24 Bit / 48 kHz audio transmission, 120 dB dynamic range, Switchable transmission power: 1 mW / 10 mW, 12 Compatible channels per 8 MHz band, Frequency transmission via infrared interface, XLR/Jack output, Pocket transmitter with TA4M connection, Transmitter operates on 1.5V AA batteries, optionally also with Li-Ion battery SB903 (not included), 19