What is the best job for user to make clear and quick enough dot alignment? It is full of challenge job until selecting a quite practically used device, such as a high brightness 532nm green laser diode module. It is projecting the most visible and the brightest green laser light from a middle wavelength of 532nm green DPSS laser system. Every time it gets enough space leaving for inner part of metal heat sink cooling system, either adopting 16mm or 26mm diameter anodized aluminum alloy housing tube, this green dot laser is achieving superior nice thermal emitting and increasing stability green dot projection within long lasting time of 8 to 10 hours per day. According to correct use of output power, within the maximum installed distance of 3 meters, this compact size tube made green laser makes sure of easy reaching, good direction and high precision green dot alignment at various work distances.