2. We recommend not operating the laser pointer continuously for more than one minute at a time to prevent overheating, which can damage the laser or shorten its lifespan.
3. Remove the batteries when the product is not in use, and store the batteries in a safe place out of reach of children.
4. If the laser output is low or dim, recharge or replace the batteries.
Usual, no switch lock for 445nm lasers, but self-locking switch, so avoid it is used by children!
No focusing, for the high power, the beam can burning or cutting much more things.
Paper is burned.
For the work voltage is >6.0V, it must use 2pcs 123A or 16340 recharge battery,
Attention: The battery is not allowed inside by custom in some area, maybe custom will confiscated all the goods for the battery, so please know the law in your country. Of course, we can know it from other way instead of you if you can't confirm it.