Features: _x000D_ This collimator has built-in battery and supports 7 levels of brightness adjustment of laser. _x000D_ Can help accurate collimation of telescope in a quick and easy way. _x000D_ With an adapter, transferring 1.25inch to 2inch thread. _x000D_ Power saving design, low consumption and durable for long time use. _x000D_ Suitable for Newtonian, Marca._x000D_ _x000D_ _x000D_ _x000D_ Specification: _x000D_ Material: Metal _x000D_ Color: Black _x000D_ Laser Power: 1mw _x000D_ _x000D_ Laser Brightness Adjustment: 7 levels _x000D_ Battery: 1 x CR2032 (included) _x000D_ Adapter Type: 1.25inch - 2inch _x000D_ Collimator Size: Approx. 13 x 3.17cm / 5.11 x 1.2inch _x000D_ Weight: Approx. 253g _x000D_ Suitable for Newtonian, Marca _x000D_ _x000D_ _x000D_ Package List: _x000D_ 1 x Collimator _x000D_ 1 x Lens Adapter _x000D_ 1 x Manual 1This collimator has built-in battery and supports 7 levels of brightness adjustment of laser 2Can help accurate collimation of telescope in a quick and easy way 3With an adapter, transferring 1.25inch to 2inch thread 4Power saving design, low consumption and durable for long time use 5Suitable for Newtonian, Marca