Shure SLXD124E/85 K59, Digital UHF Wireless System, Frequency range: 606 - 650 MHz, Set comprising 1x SLXD4 receiver, 1x SLXD2 handheld transmitter with dynamic SM58 microphone capsule (cardioid) and 1x SLXD1 pocket transmitter with WL 185 lavalier microphone (cardioid), 24 Bit / 48 kHz audio transmission, 120 dB dynamic range, 44 MHz switching bandwidth, Switchable transmission power: 1 mW / 10 mW, 12 Compatible channels per 8 MHz band, Frequency transmission via infrared interface, XLR / jack out, Pocket transmitter with TA4M connection, Transmitter operates on 1.5V AA batteries, optionally also with Li-Ion battery SB903 (not included), 19" Mounting hardware included@+*Note:* Single receiver - handheld and bodypack transmitters cannot be used at the same time@+@+