Featuring an integrated PG58 microphone cartridge, the BLX2/PG58 Handheld Wireless Microphone Transmitter delivers wireless audio with professional clarity and reliability. Works with BLX® Wireless Systems Offers up to 14 hours of continuous battery life with 2 AA batteries Allows for custom handle design at designstudio.shure.com Includes BLX2/PG58, microphone clip, 2 AA batteries, and user guide The BLX2/PG58 Handheld Wireless Microphone Transmitter works with BLX Wireless Systems.  Features Integrated microphone capsule design Lightweight, rugged construction -10 dB gain attenuation Color ID caps (available separately) Warranty 2 years.