Close Focusing: Observation Near landscape can see both far and near, suitable for bird watching, hunting, hiking, camping, sightseeing, Stretchable Freely stretchable fun and interesting, so many lovers canot put it down, small, light and portable Blue Film: It can high light-transmittance and low reflectivity to increase light-transmittance and a clear and bright field of view BQK4 Lens: BAK4 lens, exit-pupil is a round light spots, the light-transmittance is very high, clear and bright All-Metal Frame: All-metal frame, fashionable and beautiful