Cheap And Discounts WaveTopSign Blue Laser Module 445nm 0.5W 1W 1.6W 2.3W 2.6W 5.5W 12VDC TTL PWM Control Signal for Laser Engraving Machine Wholesale. Buy Directly From Merchant wavetopsign Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.