Designed for reflector telescopes. Compatible with standard 1.25 inch and 2 inch diameter interfaces, includes a 2 inch adapter. Features three adjustable collimation screws on the body to align the laser collimator precisely. Specially designed for reflector telescopes with a 1.25 inch focuser. Offers 7 adjustable brightness levels for improved ease of use compared to manual collimation eyepieces. Constructed from durable metal with a black finish and high-quality aluminum coating. New generation design. Size: 1.25 inch. Wavelength: 635-655nm. Output power: 1mW - 5mW, eye-safe performance. Powered by 1 x CR-2032 battery (not included). Material: Metal. Color: Black. Package includes: 1 x Collimator. Only the listed item is included; other items are not part of the package. Note: Lighting and display differences may cause slight color variations between the image and actual product. Measurement tolerance: +/- 1-3 cm.