Fitness headset with built-in micro transmitter (no beltpack or cable required) Water-resistant design for high-energy instructors/performers Marine-grade stainless steel gooseneck AE50X micro-miniature microphone capsule with cardioid pickup pattern Offers up to eight hours of battery life using built-in rechargeable lithium ion battery Sealed gold contact charging connector for included USB-style charger Low battery LED indicator 300' operating range (line-of-sight) Variable Gain control 1-touch Mut