Shure BLX24R/B58 BETA 58 Handheld Wireless System w/BLX24R Receiver, Case, and Beta 58 Mic BLX4R Rack-mountable receiver with removable antennas for quick distribution Works with BLX Wireless Systems Offers up to 14 hours of continuous battery life with 2 AA batteries Includes BLX2/B58, microphone clip, 2 AA batteries, and user guide