Product description Monocular Telescope 4K 10-300X40mm has high quality optics offer high quality vision. 10x-300X40 easy rotation adjustment, also added the function of adapting to myopic people. Let yourself feel this clear world with your heart. Phone Clip Compatible mobile phone: iPhone 14/14Plus/14Pro / 14 Pro Max/ 13/13Pro/13Pro Max /12/12Pro/12Pro Max / 11/11 Pro / 11 Pro Max / XS / XS Max / XR / X / 8 plus / 8 / 7plus / 7/6 / 6s / 6plus, Samsung GALAXY S23S22 S21S10 , S10 +, S9, S9 +, S8, Note, LG, HTV, Sony and almost all other smartphones on the market. Magnification: 7-17 times (corresponding to setting level 10X100) Product name: 4k 10-300x40mm Super Telephoto Zoom Monocular TelescopeDescription Product name: 4k 10-300x40mm Super Telephoto Zoom Monocular Telescope Size: 173/128 * 43mm (stretching and shrinking) Objective lens diameter: 40mm Magnification: 7-17 times (corresponding to setting level 10X100) Eye piece diameter: 21mm Exit pupil diameter: 4.2-1.7mm Eye relief: 14-12mm Field of view: 241-136FT (1000YDS) Field of view: 4.4-2.1 degrees Minimum focusing distance: 3mInstructionsHold the telescope barrel with your left hand and see a circular scene, turn the eyepiece hand wheel with your right hand until you see a clear scene position. Pay attention to the position of the scale under the eyepiece handwheel. Generally, you can turn it to the same position when you use it again in the future.Package Included1x Super Telephoto Zoom Monocular Telescope1x Phone clip1x Tripod1x Eyepiece and lens protection covers1x Storage bag1x Cleaning cloth1x Belt1x Manual