Shure QLXD24/KSM8B S50, Digital UHF Wireless System with Dynamic KSM8 Capsule, Frequency band: S50 (823 - 832 MHz and 863 - 865 MHz), 24 bit / 48 kHz audio signal, AES-256 encryption for tap-proof transmission, Up to 72 MHz switching bandwidth, 22 compatible channels in an 8 MHz TV band, Switchable transmission power: 1/10 mW, 120 dB dynamic range, Handheld metal transmitter with dynamic dual-dyne KSM8 microphone capsule, Characteristic: Kidney, 9.5"" metal receiver, Detachable BNC antennas, Ethernet port for system monitoring and configuration, Frequency transmission via infrared interface, Output: XLR / jack, Transmitter operation with either 1.5 V AA batteries, or with (optional) SB 900 lithium ion rechargeable battery, Includes PS23 power supply and rack mount