Features: Two operating voltages of 3V and 5V optional, so you can choose the right power supply configuration according to your specific needs enhances compatibility. Provides clear and bright red dot, suitable for positioning, alignment, ranging and other application scenario. The head from coppered cmponent with good heat conductivity and durability, ensuring stable output. The small structure with outer diameter of only 6mm is easy to integrate and install, suitable for a variety of DIY projects and in equipment with limited space. focusing adjustment function allows users to simply adjust the degree of focusing of the beam as need to meet different distance requirements. Specifications: Material: Coppered Standard size: about 6x14mm/0.24x0.55in Length: about 6.50cm/2.56in Transmission power: 150mW Working life: 1000hours Mode: dot-shaped dot, continuous output mode: 650nm (red) Light output power: 5mW less Supply voltages: 5V/3V Optiopnal Operating current: 40mA less Operating temperature: -36°C~65°C Storage temperature: -36°C~65°C Size of light dot: The light dot at 15meters is φ10mm~φ15mm Product weight: 1.1g Quantity：10pcs/20pcs Package Includes: 10/20pcs Mini Diod Circuits note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution