sE Electronics RF PRO B2 Mounting Bracket UpgradeIncreased stability, simplicity, longevity, &performance. An upgrade kit for your Reflexion Filter Pro. The improved originalIn 2006, sE invented the Reflexion Filter and with it, a whole new category of recording equipment. With over 120,000 units sold, it has remained the indisputable industry standard for legendary singers, rappers, composers, producers, and engineers worldwide. This hardware upgrade kit for any existing Reflexion Filter Pro helps