The Countryman B3W4FF05WSR is the companies premier B3 lavalier mic tailored specifically for Sennheisers Evolution EW wireless series of bodypack transmitters. It has a standard sensitivity gain that applies for most uses and has a white finish. Countryman's B3 is essential to any well-stocked pro audio toolkit: it captures the highest-quality audio available in a lavalier mic, with field-selectable HF response caps and extremely low handling noise. Whether you need a tie-clip lavalier for an interview, a hair-hidden mic for drama, a water-resistant mic for water sports or hurricane reporting, or simply a small mic to hide in a prop flower vase, you will never run out of applications for the Countryman B3 lavalier.