The Mini Bloodhunter Plus Flashlight uses a patent pending technology with a special filter that diffuses red light over green to create the ideal blood trailing zone. The blood trailing zone created is a light that enhances the color red, making blood stand out. The Mini Bloodhunter Plus Flashlight gives you the opportunity to enhance the color red making a blood trail much easier to follow with the convenience of a super bright 95 lumen White LED flashlight built-in.