405nm 445nm 450nm 520nm Diode Driver Circuit Board for 1W 2W 3W Laser 12V TTL Parameter: Buck circuit, fixed recent output (Output recent and output calories can be adjusted); With TTL port. Suitable for 405nm 445nm 450nm 520nm laser diode Suitable output power: 200mW-3 Output latest (Max): 2 Size: 29mm * 49mm Input voltage: 8-14V DC/AC (12VAC/DC recommended) Package: 1pc Diode Driver Circuit Board for 405nm 445nm 450nm 520nm 200mw three Laser 12V TTL