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. This 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 when operating the device, especially when using invisible lasers. Do not aim the laser at vehicles, aircraft, or any manned vehicles. Handle the battery with care to avoid short circuits, overheating, or potential explosion. Ensure proper battery installation and prevent unauthorized removal. Laser emission principles give it unique 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 to 15mm at 15m This laser head is commonly used in laser tools such as levels, alignment devices, and measurement instruments. It consists of three components: a light-emitting tube core, condenser lens, and copper adjustable sleeve. The unit is pre-assembled with focused optics and securely bonded before shipment. 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 air. The spot 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: - Educational pointing device: Teachers can use the laser dot to highlight areas of interest during presentations. - Electronic level tool: When mounted on a rotating base, the laser projects a straight line for alignment in 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: Direct the laser onto a glass surface; reflected beam vibrations can be analyzed to detect sound vibrations. - Remote light-controlled security alarm: Set up a laser beam and photosensor across an area such as a field or pond, using mirrors to create a detection perimeter. - Long-distance wireless communication: Position laser transceivers on separate buildings to transmit data via serial communication protocols. Note: Due to variations in lighting and display settings, actual product color may differ slightly from images. Slight dimensional variations may occur due to manual measurement.