HX1 PNR General Aviation Headset. Engineered for exceptional comfort and functionality, this headset features Passive Noise Reduction (PNR) technology to ensure clear communication in noisy cockpit environments. With protein foam ear seals and comfortable foam padding, the HX1 delivers all-day wearability for professional and recreational pilots alike. The HX1 is compatible with trainer aircraft such as Cessna 152, Cessna 172, Tecnam, Diamond DA 40/42, Piper Seneca, Beechcraft, and more, making it a versatile choice for all aviation professionals.