Allows operation of up to 4 compatible systems in a typical setting, and up to 8 maximum under ideal conditions. Operating range: Indoors: Up to 100 feet (30 m) typical, with a maximum of 200 feet (60 m) under ideal conditions. Outdoors: Up to 65 feet (20 m) typical, with a maximum of 165 feet (50 m) under ideal conditions. Rugged and reliable Shure construction. Legendary Shure microphones options featuring an integrated microphone capsule design.