Travel Partner Monocular; Lightweight and compact design makes the monocular easy to carry; 2.5m close focus distance allows you to study in detail close objectsExcellent Optics; Fully multi coated to produce sharp images; BAK4 roof prism for intense colour and contrast; Advanced optics delivers stunning photos Waterpoof Nitrogen Filled Fog-proof; O-ring seals to prevent moisture dust and debris into the scope; Nitrogen filled makes the monocular keep away fog influence; provides a reliable performance in all environmentsNature Rubber Armor; Non-slip textured rubber design, the monocular has good grip in all weather conditions; Nature rubber no odor and can directly contact the skinEasy Operate Monocular; Smooth central focusing knob allows you easily and rapidly to focus on objects; 21mm large eyepiece with twist up eyecup for comfortable observation; even for glasses wearers