Thanks Madman, I now understand that:
FirmTech's first product, The Performance Ring (FPR) has flexible loops, one for the base of the penis and the other around the top of the testicles, the loops are supposedly soft and will not move, or pinch during use.
FirmTech's second product, The Tech Ring (FTR), is similar to the FPR except that it includes two sensors, Bluetooth connectivity, a charger that uses USB connectivity with a 12 hours of battery life. The sensors can count the number of nocturnal erections, the duration and firmness of erections, the strength and force of ejaculatory contractions. Using FirmTech's smart phone app one can easily access the number of nocturnal erections and the duration of erections can be noted. The software must have some form of self-calibration to learn what the individual users flaccid and erect norm's are.
I have seen & downloaded the App on the Play Store, but without a device connected all that can be seen is that the app records daily and asks for user data such as age, BMI, life style (Alchol, drug use) etc etc. No pre purchase examples are given.