Never point the laser at yourself or anyone else's eyes at any time. Even when the laser is turned off, it may accidentally turn on. Do not direct the laser toward any reflective or smooth surfaces. Lasers can reflect off such surfaces 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 safety. Misuse may result in injury. Wear appropriate laser safety goggles when operating the device, especially when working with invisible lasers. Avoid shining the laser on vehicles, aircraft, or any manned vehicles. Handle the laser’s battery with care to prevent short circuits, overheating, combustion, or explosion. Ensure proper battery installation and storage. The unique principles of laser generation give it properties that ordinary light does not possess: 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 tools, leveling devices, alignment instruments, and similar applications. It consists of three main components: a light-emitting diode core, condenser lens, and copper focusing sleeve. The unit comes fully assembled with the lens focus pre-adjusted and securely bonded. Simply connect to a 3V DC power supply to operate. Under ideal conditions—clear air with no dust, smoke, or obstructions—the theoretical transmission distance of a laser beam is very long. With a 20mA operating current, the beam can reach over 1km under good atmospheric conditions. At night, the dot remains clearly visible on objects up to 200 meters away. Even in daylight, the laser spot is easily seen on outdoor surfaces such as roads and buildings at close range. Applications include: - Electronic pointer pen: Useful for teachers during presentations to highlight areas of interest. - Electronic level tool: When mounted on a rotating base, it 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 onto walls. - Long-range monitoring: Shine the laser onto a window; the reflected beam can be analyzed to detect vibrations and recover sound from inside a room. - Remote light-controlled security alarm: Position a laser emitter and photosensor at one corner of an area like a pond or field, with mirrors at other corners to create a detection barrier. - Long-distance wireless communication: Set up paired laser transceivers on rooftops of distant buildings, using microcontroller serial protocols to transmit data or enable internet connectivity. 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. Sold by Minnanxin