Hi! Thanks for your comment, there wasn't enough space to add this info in the post but medical studies evaluated safety and efficacy of SmartPill and concuded it's safe non-invassive assessment technology that provides valid info about gastrointestinal complications so they can get the best treatment. Simple, painless and avoids uses of wires attached or X-Rays radiation.

It wirelessly transmits data about your GI tract to a recorder that you wear on a belt clip or lanyard around your neck as you go about your daily activities.

Depending on how slowly intestines moves it can be from just hours to 3-5 days working its way through the patient system.
Contraindications are patients who have heart pacemakers or pacemakers in other organs, FDA advises against giving SmartPill to them and those who has a MRI scheduled just to avoid to go with a pill inside of them.