I have a blue ray made by Daguin around 150 mw according to him i have never tested this because i don't have a meter and one 280 mw red laser made by Modrewerx and a green laser made by china laser. The Blue ray is using c123a batteries it needs 2 to work but one batteries set it will last a long time. I haven't used them alot because i had eye surgery and i was away for a long time. For illustration the blue ray i have changed the batteries only once . The green laser and the red comes with a rechargeable batteries and a charger. For the out put of the green laser i am not sure but from what i have seen if the weather is fogy you can see the beam even during the day. All of them have adjustable focus and they can burn different objects. At night you can see the beam of the red and the blue ray. Please look at the attach pi cutes. I am selling them because now i have a child and i can't used them anymore around the house. For the green laser i suspect that it is around 50 to 60 mw. I want to sell them together so please make me an offer.