Check the listing for details. 18mm 405nm 20mW Violet Blue Light Dot Laser Diode Module 5V. Condition: New. Listed at 15.00 USD. Product Description 405nm Violet Purple Blue 20mW Point Dot Diode Laser Module Description: Output Power: 20mW Wavelength: 405±10nm Working Voltage: 5V Working Temperature: -10 ℃~＋40 ℃ Duty Cycle: 20 minutes on, 3 minutes off Laser Shape: Dot Dimensions: φ18mm Focusable: Yes Suggesting Working Distance: 10m With built-in Driver and high-quality Glass collimating lens, what you need to do is to better wear your protection goggles, and insert the power adapter plug into the socket, the laser would work and project beautiful bright and clean straight line. Accessories: Accessories are shipped according to your option. 1. AC-DC universal adapter for easy usage. 2. Mount for holding the laser. 3. We have EU and US standard plug for your option.