Never point the laser at yourself or others' eyes at any time. Even if the laser is turned off, it may be accidentally activated. The laser should not be directed at any reflective or smooth surfaces, as reflections can occur and potentially cause eye injury if they enter the eyes. This laser product is not a toy and should not be used by children, individuals with limited understanding, or those unfamiliar with laser properties, as misuse may result in injury. Wear appropriate protective eyewear when operating the laser, especially when using invisible wavelengths. Do not direct the laser beam toward vehicles, aircraft, or any manned vehicles. Handle the laser's battery with care to avoid short circuits, overheating, or potential explosion. Ensure proper installation and prevent unauthorized removal. The unique principles of laser generation give it characteristics not found in ordinary light: high monochromaticity, coherence, directionality, and brightness. Product Name: Laser Small Copper Head (Red Light) Output Power: 5mW Lifespan: Over 1000 hours Spot Mode: Dot spot, continuous output Laser Wavelength: 650nm Power: 50mW Voltage: 3V Current: < 20mA Operating Temperature: -36C to 65C Storage Temperature: -36C to 65C Spot Size: 10mm15mm at 15m This laser head is commonly used in laser devices such as levels, alignment tools, and measurement instruments. It consists of three components: a light-emitting diode core, condenser lens, and copper focusing sleeve. The unit is pre-assembled, focused, and securely bonded before shipping. Simply connect to a 3V DC power supply to operate. Under ideal conditions (clear air, no obstructions), laser beams can travel long distances. With a 20mA operating current, the beam can reach over 1km in high-quality atmospheric conditions. The dot remains clearly visible on objects up to 200 meters away on cloudy nights. At closer ranges, visibility remains strong even in daylight on outdoor surfaces. Applications include: - Laser pointer for presentations: Teachers can use the beam to highlight areas of interest during lectures. - Electronic level tool: When mounted on a rotating base, the laser projects a straight line for alignment during construction or decoration. - LCD projection setup: Remove the condenser lens and pass the laser through a controllable LCD screen to project images. - Long-range monitoring: Direct the laser onto a glass surface; reflected light can be analyzed to detect vibrations and recover sound. - Security alarm system: Position a laser emitter and photosensor at one corner of an area, with reflectors at other corners, to create a detection barrier for intrusion prevention. - Wireless communication link: Set up paired laser transceivers on separate buildings to transmit data using serial communication protocols.