10-300X40mm Monocular10-300x40mm high power monoculars for adults - provides a clearly and bright image. This monocular has large field of view, just feel free to enjoy bird watching, hunting, hiking, camping, sightseeing and concertBAK4 MonocularThe 10-300x40mm monocular equipped with BAK4 prism, guarantee superior light transmission and brightness. The monocular has low-light-level night vision, it could help you see things in low light(can't see anything in complete darkness), provide you a amazing viewing experienceWaterproof MonocularNitrogen-filled waterproof and O-ring optical components can prevent moisture, dus and debris, ensures the waterproof function, fit for the most weather and environmentPerfect AccessoriesThis mini monocular telescope is easy to hold by one hand(12*4*4 cm). You also could connect your phone with the tripod and smartphone adapter which include in our package. It's very convenient when you watch something for a long timeHigh Quality Made of high-quality metal titanium alloy, with higher strength. High-quality optical glass devices can improve a wide field of vision