Dr. Bushnell/Model 10X40Structure single tube telescopeFunction type common telescopeCivilian use telescopeInstrument magnification 10Packing number 50Objective lens diameter: 40mmFocal length: ocular rotation regulationCoating: multilayer broadband blue filmMaterial: metal materials for telescope.Parallax compensation: -350Length: 140mmNet weight: 100gThe whole set includes: telescope， pocket， hanging belt， cloth and damp proof beads， the original factory English manual.[maintenance]1， wipe the lens， with a telescope attached to the lens cloth， or other soft， clean cloth.2， remove the residual stains， in velvet 1-2 drops of alcohol.3， the telescope should be stored in ventilated and dry environment