Blue Line 450nm 50mW Focusable Laser Diode Module 3-5V Locator 12x35mm

450nm 50mW Blue Dot Laser Module. 1x 450nm 50mw Line Laser Diode Module. Wavelength: 450nm. Focusable: Yes. Output Power: 50mW. Red wire connects positive pole "+‘’and black wire connects negative "-".

eBay