Never point the laser to yourself or others' eyes at any time. Even if the laser is turned off, it may be accidentally activated. The laser must not irradiate reflective or smooth surfaces, as reflections can occur and potentially cause eye injury. This laser product is not a toy and should not be used by children, individuals with limited understanding, or those unfamiliar with laser safety. Misuse may result in injury. Wear appropriate laser safety goggles during operation, especially when using invisible lasers. Do not direct the laser beam toward vehicles, aircraft, or any manned vehicles. Handle the laser battery with care to prevent short circuits, overheating, combustion, or explosion. Ensure proper installation and avoid unauthorized removal. The unique principles of laser emission give it distinct properties 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: -36°C to 65°C Storage Temperature: -36°C to 65°C Spot Size: 10mm–15mm at 15m This laser head is commonly used in laser pointers, leveling tools, alignment devices, and similar applications. It consists of three main components: a light-emitting diode core, condenser lens, and copper adjustable sleeve. The unit is pre-assembled and focused before shipping, with secure adhesive applied to maintain alignment. Simply connect to a 3V DC power source to operate. Under ideal conditions—clear air with no dust, smoke, or obstructions—the theoretical beam range is very long. With a 20mA operating current, the visible beam can extend over 1km. On cloudy nights, the spot remains clearly visible on objects up to 200 meters away. At closer distances, the beam is clearly visible on outdoor surfaces even in daylight. Possible Applications: - Electronic pointing device: Teachers can use the laser dot to highlight areas of interest during presentations. - Electronic level tool: Mount the laser on a rotating base to project a straight reference line for wall alignment or decoration. - Micro LCD projection system: Remove the condenser lens and pass the laser through a controllable LCD screen to project images. - Long-range monitoring: Project the laser onto a glass surface in a surveillance setup; detect vibrations from reflected light to capture sound. - Remote light-controlled security alarm: Position a laser emitter and photosensor at one corner of an area to protect (e.g., pond or field), with reflectors at other corners to create a detection zone. - Long-distance wireless communication: Set up paired laser transceivers on rooftops of distant buildings, enabling data transmission via microcontroller serial protocols. Note: Due to variations in lighting and display settings, the actual product color may differ slightly from images. Slight dimensional differences may occur due to manual measurement.