10x50 maritime telescope with waterproof and anti-fog ED lenses, high-definition infrared rangefinder, dual-eye design. Accurate compass navigation, night-time infrared illumination, ultra-strong waterproof and anti-fog. ED lenses reduce chromatic aberration, providing fast and accurate range finding, with durable maritime-grade materials. Clear observation in adverse weather conditions, providing safe and reliable navigation for maritime exploration. Explore the unknown oceans, enjoy the freedom of adventure, and ensure the quality of your every sailing dream.