The Pyle PMKW Water Resistant and Lightweight Headset Microphone Systems are the perfect choice for fitness, exercise and dance instructors. Use it indoors or out and provide everyone with the motivation they need to keep-on going. Flexible, compact and comfortable design withstands heavy perspiration to train longer and harder - which makes it great for just about any active or mobile performance. Stainless steel reinforced head-frame makes these microphones suitable for even the most demanding sessions. The PMKW Headset Mics can be optioned with connectors compatible with the most popular brands of wireless microphone systems including Shure (4 Pin XLR Jack Connectors), Sennheiser (1/8" Screw Lock (3.5mm) Jack Connectors) and standard 3.5mm jack connectors.