We will return you the money if you aren't happy with your ENDOSNAKE.
ENDOSNAKETM VIPER 3.9MM
"Designed with the aid of Armed Forces and Law Enforcement members. This amazingly small (3.9mm) smartphone borescope is powered by the most advanced technology in the market. After over 9 months of R&D, it is now specifically compatible with the AR-15 family of weapons. It uses optoelectronic technology to get you into hard-to-reach areas that were previously off-limits to you, and required paying by the hour, or spending hundreds on industrial borescopes. Now you can even record videos and take photos with unobstructed view and illuminated with intelligent LED control. This multifunctional and highly effective tool is perfect for any situation.