Shure QLXD14 K51, Digital UHF Wireless System, Includes pocket transmitter for guitar and bass, 120 dB dynamic range, Audio signal: 24 bit / 48 kHz, 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, Metal pocket transmitter with 4-pole TQG connection, 9.5"" metal receiver, Detachable BNC antennas, Ethernet port for system monitoring and configuration, Frequency transmission via infrared interface, XLR/jack output, Transmitter operates with either 1.5 V AA batteries or with (optional) SB 900 lithium ion battery, Frequency band: K51 (606 - 670 Mhz), Includes PS23 power supply, WA302 guitar cable and rack mount