Product Adjustable laser collimator;allows anyone easily collimate 1.25'' and 2'' reflector telescopes;come with removable 2 adapter;built with metal material;make alignment no longer boring and time consuming Super easy to use;accurate collimation in a few minutes provide a more clearer image;no longer have to go back forth;just watch the collimator from the mirror end of the scope and adjust the screws 7 brightness levels red laser beam;adjustable brightness;suit for different light conditions;amazing alignment in dark and day;so can get the better views possible from your reflector telescop This is a newest 1.25 red laser collimator includes removable 2 adapter;the triple cemented lens to improve the stability of dot;it's designed for accurate collimation of all Newtonian and SCT reflector telescopes This Datyson laser collimator can get the better image from the telescope;just insert it into the eyepiece holder;adjust laser beam level;then adjust the telescope screw until the laser beam shoots into the target center. Features: Designed for reflector telescope Fit for standard 1.25 and 2 diameter interface with a 2 adapte Red laser with 7 brightness levels Quick alignment;much faster than a manual collimato User adjustable collimator 3 collimation screws on the body to get the laser collimator aligne CR2032 lithium cell battery Not Included need to prepare by yourself Triple cemented of Lens Improve the stability of red do Much easier aligned process Watch the collimator from the mirror end of the scope and adjust the screw Quality durable metal materials Metal material for a long term us Output power 1mw to 5mw Much safer for eye The Best working distance is 2m 1-5m spots will not change of shap Wavelength:635 to 655nm Class II laser product I Package Include: 1x Laser collimator 1x Adapter sleeve 1x user manual Warning: Dont look directly into the laser beam;permanent eye damage may result Avoid prolonged skin exposure to laser rashes or burns may occur Operation instructions: Insert the laser collimator into the telescope eyepiece;then turn on the laser calibrator Light source brightness can be adjusted;total 7 adjustable Compared to professional machines more simple to use;more accurate test