Wireless receiver is used but in perfect working order. Comes with 2 antennas and the front antenna kit (to mount on front side instead of just the back.)

This receiver is band A, which is 470-636 MHz.

Shure Axient AD4D 2-channel Digital Wireless Receiver Features:

• 2-channel digital wireless receiver for Shure AD series and ADX series transmitters
• 184MHz tuning range across all receivers and transmitters
• Up to 47 active transmitters per 6MHz TV channel
• Frequency Diversity plus advanced interference detection and avoidance
• High-density mode dramatically increases system channel count
• Ultra-low 2ms latency for seamless performance
• AES3 and Dante digital outputs available
• AES 256-bit encryption for secure transmission
• ShowLink remote control provides real-time control over ADX transmitter parameters from your mix position
• Wireless Workbench software for advanced RF spectrum and Timeline plotting, frequency coordination, and live monitoring
• ShuprePlus Channels app for monitoring and control from your iOS device
• Networked charging offers remote monitoring of charging status and remaining runtime