1600mW 445nm 12V Laser Module Laser Engraving Machine part Laser Head, with TTL PWM, can control laser power and adjust focus - BeamQus
2W 450nm Blue TTL (PWM) Laser Module with Adjustable Focus 12V - OdicForce
Pwm To Ttl Transition Module Laser Cutter Engraver Control Board Accessories For Eleksmaker Mana Se Controller Ttl Modulation - Woodworking Machinery Parts - AliExpress
Laserland Blue 450nm 5.5w Laser module for engraving/marking/cutting w/ PWM/ TTL focusable - 450nm 473nm Dot Module - 445-495nm Blue Laser Module - Laser Module