300mw 405nm 5V Blue Purple Laser Head

Benbox 300mw 405nm 5V Blue Purple Laser Head, DIY Laser Machine Parts Laser Diode Laser Tube

Product Description:
Wavelength: 405nm m, blue purple laser
Optical power: 300 mW
Voltage: 5.0V (it can use the phone battery or three batteries, etc.)
Length: 66 mm