RHS-0636Q Tactical headphone With its low-profile design, minimal weight and comfortable fit, Ultra-light Behind the Head Headset is a perfect choice for challenging environments. its slender frame,with strong, adjustable ear hook and a flexible Behind the Head, it is designed to fit any wearer perfectly. Headset fits easily under hats and helmets without compromising comfort or usability, and the solid radio connector enables endless combination options for this highly versatile unit.