Parameter

Wavelength: 650nm, 658nm
Output Power: 30mW
Working Current: <30mA
Working Voltage: 5.0VDC
Duty Cycle: 5 minutes on, 1 minute off
TTL frequency: 0-20KHz
TTL modulation Voltage: 0-5V Off low, high open, normal status open
Dimensions: 12mmx40mm or 12mmx35mm (option)

Detail:
Red wire for 5V+, black wire commonly for 5V- and also for TTL -, Yellow wire for TTL +. If you only connect its black wire and red wire, the laser would not work, you also need to connect its yellow wire (TTL+ ) to 5v+. When the TTL signal is connected, the higher the frequency is , the less brighteness the laser will have. when it is >20KHZ, the laser cannot be seen.
This 650nm laser module with driver built-in is an industrial electronic component and used for Industrial testament, Lab.Before carrying on some laser DIY activities, please read about the technical information first and protect your eyes before laser ray. Be sure the operator has Experience in optics DIY or testing.

Package

1pc 650nm 658nm 30mW Red Laser Dot Diode Module w/ TTL 0-20KHZ