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 protective eyewear when operating the laser, especially with invisible wavelengths. 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 installation and prevent 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: -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 measuring instruments. It consists of three components: a light-emitting tube core, condenser lens, and copper adjustment sleeve. The unit comes fully assembled with pre-adjusted focus and secured with strong adhesive. 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 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 pointer: 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 line for alignment during decoration or mounting. - LCD projection system: Remove the condenser lens and pass the laser through a controllable LCD screen to create wall projections. - Long-range monitoring: Direct the laser onto a glass surface and detect reflected vibrations to monitor sound activity. - Remote security alarm: Position a laser emitter and photosensor at one corner of an area to protect, with reflectors at other corners to create a detection zone. - Wireless communication setup: Use paired laser transceivers mounted on separate buildings to transmit data via serial communication protocols. Note: Due to variations in lighting and screen settings, the actual product color may differ slightly from images. Slight dimensional differences may occur due to manual measurement. Sold by Minnanxin