Shure - QLXD4E - K51 (606-670 MHz)

Shure - QLXD4
In the box: PS24 Power supply, 2 1/2 Wave Antenna, 2 BNC Cable, 2 BNC Bulkhead Adapter, Rackmount Kit, Rackmount Bracket-Long, Rackmount Bracket-Short, Link plate & 4 Receiver Rubber Feet.

Digital wireless receiver combines professional features with streamlined set-up and operation. Features include Automatic Channel scan, Networked Channel Scan, digital predictive switching, and AES 256 encryption for security.

Automatic Channel Scan quickly finds clear frequencies; Networked Channel Scan then shares open frequencies between multiple receivers over Ethernet, with one touch syncing
Digital Predictive Switching Diversity ensures a stable RF connection
Highly efficient RF spectrum usage – up to 22 transmitters per 8 MHz channel
Secure AES 256 bit encryption of all wireless transmissions
Shure Wireless Workbench® software allows remote control from PC or Mac
ShurePlus™ Channels mobile app allows remote control from iOS devices
Half rack format with detachable ½ wave antennas
Up to 60 dB of adjustable audio gain 
Up to 72 MHz tuning bandwidth (region dependent)
More than 60 pre set compatible channels per frequency band (region dependent)
High contrast LCD menu and controls with lockout feature, plus Audio and RF LED meters with peak indicator
Mic / line switchable XLR output, and 6.3 mm instrument output
Durable aluminium construction with brushed finish