Cheap And Discounts Adjusated 450nm 445nm 100mw NDB7875 Blue Laser Diode Dot Module with 12V TTL Modulation & Long Time Working Wholesale. Buy Directly From Merchant My shine shine Jolooyo Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.