638nm 700mW Red Focusable Dot Laser Diode Module + Fan Cool + Driver TTL 

Feature:
Diode: Multimode
Wavelength: 635nm 638nm
Output Power: 700mW
Operating voltage: DC12V
Laser shape: Dot (Rectangular to Oval)
Focusable:YES
Can use it with TTL Modulation
TTL modulation: 0-20KHz
Laser head size:33x33x50mm

Fan Cooing
Case Material: Aluminum
Finish Color: Black
The circuits control: constant current
Warm-up time: None
Reverse polarity protection: with automatically identify the positive and negative  

Package:  
1x 638nm 700MW Dot Laser Module w/ Driver

Shippment:
1.Every parcel will be registered with tracking number. 

2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions et. If the transportation time is not normal, please contact us