Shure SLX24/BETA58 Wireless Vocal System with Beta 58A Handheld Microphone, G5 SLX Wireless Systems are powerful wireless tools that can be set up quickly and used confidently by installers and working bands Features include auto frequency scan with transmitter setup, exceptional wireless clarity, and Shure patented Audio Reference Commanding Audio Input Level: +2 dBV maximum at -10dB position; -8 dBV maximum at 0dB position,Gain Adjustment Range: 10dB Includes SLX2/BETA58, SLX4 receiver, microphone clip, rack mount kit, two 1/4 wave antennas, power supply, 2 AA batteries, protective bumpers with 8 screws, vinyl bag, and user guide