If the laser head needs to be lit for a long time, please increase the current limiting resistance appropriately1. Never point the laser to yourself or others" eyes at any time. Even if the laser is turned off, it may be turned on by mistake.2. The laser cannot irradiate any reflective surface or smooth surface. The laser has excellent reflectivity. It will reflect when irradiating the reflective surface. If it happens to irradiate people"s eyes, it can cause injury.3. The laser is not a toy and should not be used by children, people with incomplete intelligence and people who do not understand the characteristics of the laser. In this case, it is very easy to cause injury.4. Wear special goggles when using the laser, especially for invisible laser.5. The laser cannot shine on vehicles, aircraft and other manned vehicles.6. Pay attention to the safety of laser battery to prevent short-circuit combustion or battery explosion caused by others removing the battery.The particularity of laser emission principle and generation process determines that laser has the characteristics that ordinary does not have: three good (good monochromaticity, good coherence and good directivity) and one high (high brightness).Product Name:Laser small copper head (red )Transmitting power: 5MWService life: more than 1000 hoursSpot mode: point spot, continuous outputLaser wavelength: 650nmPower: 50mwVoltage: 3VCurrent: