Cold Laser Therapy Handheld Device

This is the files to make a DIY Cold Laser Therapy device. I had an ankle injury and wanted to see if using Low Level Light Therapy would help. I didnt like that devices were in the 200$ range. I was able to create this with simple laser dioes from Amazon.

parts list:
-Simple Stretch strap from Dollar store
-Laser Diodes ( https://www.amazon.ca/Gikfun-Laser-Module-Arduino-EK1060x5C/dp/B07FM6FDFM/ref=sr_1_3?crid=3049VFRX2E34R&keywords=laser+diode&qid=1559511924&s=gateway&sprefix=laser+dio%2C