The e of the monoscope allows it to be used in the harshest weather conditions.br/ The rubber armor es it comfortable to wear and prevents the monocular beach from slipping out of your hand.br/ The fixed-point telescope is made on the BAK4 system and a multi-layer broadband green film lens,br/ Whether you are watching a football game, the telescope can bring you a viewing experience.br/ This kind of scenery can not only enjoy the scenery, but also thes. It is an ideal one-handed observation tool.br/ How to use the telescopebr/ 1. The eye must be 2 cm away from the eyepiece and cannot be directly connected to the eyepiece.br/ 2. Aim the telescope at the observation target, and then slowly turn the turntable of the upper focusing hand until it is clearly visible.br/ br/ specification:br/ Observing telescope 40x50br/ br/ magnification: 15-40xbr/ prism type: BAK4, ROOf prismbr/ field of view: 126ft/1000ydsbr/ exit pupil: 2mm-4.2mmbr/ lens coating: fully multi-coatedbr/ eye cup: fold-downbr/ waterproof: life waterproof, rainproofbr/ objective lens dia: 50mmbr/ Focus: centerbr/ field angle: 6 degreesbr/ exit relief: 15mmbr/ tripod adaptable: yesbr/ close focusing dist: 25mmbr/ dimensions: 240x190x50mmbr/ color: BLACKbr/ br/ Results:br/ Please do not look directly at the sun with a scope, otherwise it will hurt their eyes.br/ If you do not use it for a long time, please keep it in a dry place.br/ It can resist light water, but cannot be used in heavy rain or soaked in water for a long time.br/ The telescope is a precision instrument, please do not drop, squeeze or perform other strenuous exercises.