Never point the laser at yourself or others' eyes at any time. Even if the laser is turned off, it may accidentally turn on. The laser should not be directed at any reflective or smooth surfaces, as reflections can occur and potentially cause eye injury if the beam enters the eyes. This laser is not a toy and should not be used by children, individuals with limited understanding, or those unfamiliar with laser safety. Misuse can result in injury. Wear appropriate laser safety goggles when operating the device, especially when working with invisible laser beams. Do not aim the laser at vehicles, aircraft, or any manned vehicles. Handle the laser's battery with care to avoid short circuits, which may lead to fire or battery explosion. Ensure proper installation and prevent unauthorized removal. The unique principles of laser emission 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, 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 pointers, leveling tools, and alignment devices. It consists of three main components: a light-emitting tube core, condenser lens, and copper adjustment sleeve. The unit is pre-assembled and focused before shipping, with the lens securely fixed. Simply connect to a 3V DC power source to operate. Under ideal conditions (clear air, no obstructions), laser beams can travel long distances. At a 20mA operating current, the beam can reach over 1 kilometer. On clear nights, the dot is visible up to 200 meters away. At closer ranges, the beam remains clearly visible on outdoor surfaces even in daylight. Applications include: - Educational pointing device: Teachers can use the laser to highlight areas of interest during presentations. - Electronic level tool: When mounted on a rotating base, the laser projects a straight line for alignment during construction or decoration. - Micro LCD projection: Remove the condenser lens and pass the laser through a controllable LCD screen to project images. - Long-range monitoring: Project the laser onto a window and detect vibrations in the reflected beam to monitor sound activity. - Remote light-based security: Set up a laser beam and sensor across an area such as a pond or field, using mirrors to create a detection perimeter. - Long-distance wireless communication: Position laser transceivers on two separate buildings and use serial communication protocols to transmit data.