The quality and performance of the laser diode is as advertised except that the output power is in the 600MW range. However, at full focus, the narrowest beam, fails due to its design. JETLASERS customer service contacted me a few days ago with my original review. They offered to send me a replacement product instead of the first one I bought. The new unit works perfectly. At the same time, the optical accuracy may be reduced when the demo laser pointer is used in a high-light work environment. Whenever a user performs precise optical experiments with this industrial laser, the user should always be very careful with strong laser radiation. I tried adding an extension tube from another high power laser pointer and using an 18650 battery. The beam is very powerful and completely uniform. In dot mode, it emits very far. Get excited about the powerful red laser pointer. Maybe the cheap plastic stuff that fails so quickly at the wrong time annoys me and distorts my opinion of this review badly, but I'm happy. It's colored so I can find it quickly and cast a strong, wide beam. I bought one for everyone in my family this year and put them in their socks. It's just the right size and weight, and the telescoping lens that lets you increase the circumference of the laser projection is very useful.