ZJZK 5W laser, delivered in 17 days to Italy, product well packaged with a sturdy box, gives the impression of being robust and seems to be of excellent workmanship, easy to use, the battery arrived already at 100%, upon delivery I had to pay €36 in customs fees, which were immediately refunded after contacting the seller, who was very helpful and kind. Now all that's left is to test its effectiveness, possibly in a few weeks I will update the review.

Red light therapy can take months to work so only time will tell if this device works. It is heavy (in a good, professional way), easy to use and comes with glasses to not injure your eyes. I used it on my sore muscles and didn't really feel any difference. It does beep every 30 seconds which is annoying and I wish there was an option to turn off. Personally, I'd watch a video on the proper way to use for certain body parts or on pets.

This is a very nice unit. Even feels like quality just holding it. I really like the bright display. It is very easy to change settings. I have two more expensive lasers with fewer diodes (808 and 660nm) in approxmately the same size head. This one pulses faster than the others when in that mode.I use them right next to my skin so the beam can get into the deeper tissues. It's not warm enough to burn and has much better results.One thing I wish all the similar units would change is the position of the buttons/controls. On the side toward the top would be perfect. If I need to use it on my back, I want to put it behind me between the chair/couch and slightly lean on it without possible affecting the buttons/settings. It would help with them on the side.Also, this unity has a very short warranty; my others have 1 year. Even so, this is inexpensive enough.My other two units have a 5200 mAh battery, this one 3000, so a little more than 1/2 the working time bewtween charges. This one, however, charges faster.Bottom line: This one is now my favorite and I have recommended it to friends.FYI:These home units are all lower power (3B) than the very expensive pro lasers (IV). Still, they do a very good job for joint pains, muscle injuries and sprains. Even so, these are the 2 wave lengths 650 and 808nm I was looking for.

I've tried several different kinds of red light therapy devices, all priced differently from mid $50's to $199. This particular device seems like it is high quality and it does help alleviate my knee pain. I have a red light therapy lamp I've been using on my knee, but this device actually feels better than the lamp. The one thing I appreciate about the lamp vs this device is that I don't have to hold it.I love that this device is cordless, holds a charge for multiple sessions (I'm going on 5 now) and is easily portable.The instruction manual that comes with it is comprehensive and informative. I love that there's a chart with treatment times. I have found through research and my own use of red light therapy that 20 minute sessions are ideal, 2-3x a week. Anything more can actually be damaging, but I'm not a medical professional and have found this through my own research.The device has an auto shutoff timer, the display is easy to read, and it is easy to hold.5 stars!

I'm using this on our senior dog's hips. He has mobility issues that get a bit worse every year. I don't know yet if it's helping him, but I also need to get in the habit of doing it the recommended twice per day. The manual is great. Well-written, nice quality, and it covers a lot of topics. The device itself is very easy to use and has a color screen that's very crisp. I keep everything in its product box so I don't lose anything. It has foam with cutouts for the device, cord, etc. I would recommend this to someone wanting to try cold laser therapy. I also tried it on my husband's lower back (he asked!) and he didn't feel any heat coming off it.