Multi-Function: Designed for Reflector telescope; fit for standard 1.25 inch diameter; this sturdy laser unit allows to swiftly and precisely collimate Newtonian telescope; accurate collimation in a few minutes provide more clearer image

Premium metal construction and anodizing aluminium processfor long time use; require one CR2032 lithium battery 【Battery is Included】

Practical Design: Red laser collimation beam with 7 brightness levels; wavelength 635-655 nm; Output power: 3.8mW complies with Class 3R laser safety standards; much safer for your eyes; only when the optics have been accurately collimated can the telescope offer you its full performance

Well-Engineered: The laser comes fully adjusted however further adjust if required; it has three openings for adjustment; arranged at 120°; which are initially sealed; small screw cap at the rear of the laser must be first unscrewed to allow this

Friendly to Everyone: This adjustment tool can be used in all 1.25 inch focusers; provide with precise instructions in German and English about how to adjust Newtonian telescope using this laser unit; simple to get optimum performance out of telescope