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I bought these for a physics demonstration for a class for seniors. The red and green lasers are quite strong and work well, but the blue laser is quite week. A second blue example fared no better. The price is right, though, and the red and green demonstrated what I was trying to show.
Verified purchase: Yes | Condition: New
The pens arrived in expected time and we love that they are "normal" AA-battery-operated and do not need expensive button batteries. They feel good and are comfortable to use. However, right out of the gate, the violet pen barely had a light while the green and red pens were like light sabers and each made a "dot" of light about an inch in diameter. The light beams reach completely across our yard with full force which is what we need. However, after about a week of using them (to exercise our crazy light-dot chasing Golden Retriever puppy), the green light beam started to flicker in and out of strong to weak (like the violet pen, barely a discernable dot). We thought it was the batteries, but there was no difference when we changed them out and the batteries were definitely registering full charge on our meter. We realized that the batteries were "rattling" inside the green and violet pens when you shake them, but that the red pen is rock-solid. So we gently stretched the spring in the battery compartment of the green pen to try to make a better connection and it seemed to work for a few minutes. The red pen is still going strong three weeks later. The green pen is intermittent and the violet pen is still weak and tiny. These pens feel like they would be awesome and they look great, but they are just not reliable.Read full review
Verified purchase: Yes | Condition: New
Not too expensive at all! Colors look good. Im not sure if the batteries dont sit well or something but every now and then i think the batteries shake loose and they light is dim. If you unscrew it and re-screw it in - i guess it realigns the battery and it shines normal. My dog loves them. Chases all around the house or yard. I wasn't sure if color blindness was going to effect which ones he saw but he recognizes all 3 colors.
Verified purchase: Yes | Condition: New
Green and red work just fine, with the green being the brightest. The blue/violet gave less than a second of reasonably bright output, then went to dim and and has stayed there since. By dim, I mean you can't see it projected on a surface in normal room light. You can tell it's on if you put your finger right in front of the opening. For what these cost, it's still a deal for two laser pointers that work, so I didn't even bother contacting the seller.
Verified purchase: Yes | Condition: New
Can't complain much given the price. At first they were as expected and the weight was nice. As others said, the blue/purple light is a bit dim compared to the others. The green was really bright but after a week or so it is inconsistent and can go from bright to dim. Still works but not as well as day 1. For the price these are still a good buy.
Verified purchase: Yes | Condition: New