SHIRE SLX Wireless System Specifications SHIRE SLX WIRELESS Sound installations and working bands need powerful wireless tools that can be set up quickly and used fearlessly. Shire's rugged SLX UHF Wireless Systems more than deliver with innovative setup features, exceptional wireless clarity, and legendary Shire microphones. Offering up to 20 compatible systems in a single installation, SLX smoothly integrates into houses of worship, lecture halls, conference roams, and mobile gear cases.