Xiaopeng---Technical founder of our company, will answer you as soon as possible!
1. DANGER! Don't shine the beam to eyes!
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.