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Laser has both comes with battery. Can use both beams at once or one at a time. Push button turn on Fits securely under the barrel of a gun.

When I opened it up and turned it on to test it, the blue was bright and clear, nice and sharp. However the purple was so dull you could barely see it. I tried charging it for the night but when I tried today, same thing. It doesn’t matter what surface its on, the LED bulb is crap for the purple. Besides that the quality seems good. I will be returning it however.

Used on a rifle then a pistol, was satisfied. I like the usb rechargeability, seems firm enough mounting, and dual beams are useful(have Red set for 25 yards, and Green for 100 yards) on a 9mm pistol.Might have been 5 stars but warranty is only 6months, Dam.. I paid a lot expecting a lot.. Rather hope they see this and make it right..

Terrible product, purple is barely visible and can’t adjust it anyway. Took it out to shoot one shot and it knocked itself out of sight. Not good for any caliber larger than .22 in my opinion.

Love this for target shooting. green and red laser makes it visible for day or night. easy to adjust, battery last a long time and fits well on my firearm. does not make it too bulky.

This duel laser is ruggedly built. The purple laser is very weak and on most surfaces appears blueish. Product would be usable for short period as its battery does not hold onto its charge to be effective for targeting.

UPDATE: Further testing abandoned. Here's why.I moved the sight to my Ruger SR22 because the cost of 9mm ammo these days (summer 2021) Is too high to waste it sighting in a device for a test. It is a little too big for the handgun but it did manage to grab the rail and stay fixed in place. The problem was that it didn't completely clear the trigger guard and as a result had a slight upward cant to it. That took it out of the range of the elevation and windage screws used to adjust both lasers. The red laser could line up with the iron sights but I couldn't get the green laser anywhere close to the dot created by the red laser. You could argue that one was better than none but then the other issue became apparent.The lasers sit below and to either side of the muzzle of the gun you mount this on. That means that in order to adjust the laser to point of impact (POI) the lasers have to be adjusted left (for the red) and right (for the green) to mark the POI. So if you sight the device in at 20 feet that is the ONLY place the POI will match. Move the target further away and the red dot will drift left of POI. The green dot will do just the opposite. Move it closer and the dots separate. This problem would be eliminated if the lasers were stacked in the center of the sight and centered under the centerline of the firearm. They're not.I removed the sight from he SR22 and put it back in the box it came in and put the box in the storage container with parts and pieces from other firearms. I see no reason to mess with it any further.ORIGINAL REVIEW:Right out of the box this fit the rail on my Walther PDP without an issue. The enclosed hex key made short work of that attachment. The device came charged and after a few minutes I was able to align both the red and green lasers to the iron sights on the handgun. Each of the lasers has it's own set of adjustment screws for elevation and windage and once the first was adjusted it was a simple matter to just move the other to overlap the first.The red laser seems to be a narrower beam than the green in that the red is more precise than the green. I doubt that will make a huge difference when using it to target the weapon but it is worth noting.I like the fact that the on/off switch for the lasers are on either side of the device and are both easy to find without looking and soft to the touch for easy activation. I shoot right handed and the button for the red laser is within easy reach of my trigger finger when placed alongside of the slide.So that's the good. I do have some issues. Currently I have the device plugged into the USB port on a laptop. I have absolutely no idea if it is actually charging. There does not appear to be an indicator of ongoing charging or to show that it has been fully charged. In addition, it does not appear that there is a way to replace the rechargeable battery if and when it is past its useful life. Personally I dislike planned obsolescence and even at this price point it bothers me that once this is done it's done.But my biggest issue is that the expected two (or so) hour run time of the battery means frequent recharging. I don't know about you, but I don't have outlets in my gun cabinet. That means that I have a choice of taking the sight off the gun before I connected it to a power source, leave the gun in the open during the charge cycle or field strip the gun, lock up the slide and then take the frame to wherever I do the charging. None of those options are particularly appealing and a replaceable battery that could be accessed without removing the sight from the weapon would have been the ideal solution. Gun safety is your responsibility. If you opt for this sight please keep that in mind when charging.Sometime in the next few weeks I'll be taking this to the range to make minor adjustments, see how it performs and - more importantly - see how it holds up to 9mm recoil. I'll update this with a range review when I get a chance to do that.

The purple dot is a little fuzzy but the blue is sharp. They look great after a few rounds when the smoke illuminates the beam

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Really great quality

This is a great little laser, it fits my pistol snugly with no issues. It's rechargeable and has separate on/off buttons for each laser.