Handheld wireless system from BLX series that contains a BLX4 single-channel receiver, a BLX2/BETA58A handheld transmitter, a microphone clip, a power supply, and 2 AA batteries. Handheld microphone transmitter features an integrate BETA 58A cartridge and delivers wireless audio with professional clarity and reliability. It offers up to 14 hours of continuous battery life with 2 AA batteries, and -10dB gain attenuation. Single-channel receiver with microprocessor-controlled internal antenna diversity features a two-colour audio status LED indicator, and a XLR and 1/4" output connectors. Frequency: 518-542 MHz