PIONEER series are the best portable green laser among all candidates in today's laser market, and its avergae outpower is near 240mw while the focusing mechanism is much more intelligent and the high stability beam power is more guaranteed. If you want solid and pocket-sized ones, waterproof series are better choices. Waterproof models have been sealed and airproofed tightly in every gap of laser body, so the heating resistance is reduced a little, and it's recommended to turn it off for 5-10 seconds after it's left on for >30 seconds. But PIONEER, VOLUNTEER and TOPLASER-II series models are able to be left on Continously for 4-5 mins or longer. The DIY laser light pointer have 5 laser heads, one of which is to make it function like a general 200mw green laser pointer. For those who like pen-sized lasers and making laser beam shows, it's a better choice.