The Foam Windscreen for Toa Electronics WM-4310A and WM-4310H Wireless Microphones - 10-Pack is a replacement windscreen for the Toa Electronics WM-4310A and WM-4310H wireless microphones. The windscreen helps to reduce speaking and environmental noise, lessening pop and light wind that occurs during normal stage and broadcast use. These microphones are for designed high-energy applications, such as aerobics instruction, so a multipack of easy-to-change windscreens will surely come in handy.