It looks like a white bullet. It’s metal and inside is a battery. You swallow it after it is turned on in a pod. You take it 5 out of 7 days. It turns on when it gets to your large intestine and it starts vibrating which stimulates peristalsis which is the natural muscle lime movement in your intestines. I have greatly decreased peristalsis. Taking this has greatly improved my constipation. I do pay for it out of pocket. It can cost over 200 per month. I pay 189 a month. I’m on Medicare and they do t cover it of course. It contains no medication just a battery hence you can not have an MRI . If MRI needed you need to take lots of laxatives and lots of water to pass the pills, may take a few days and then and the take an x ray to see if no capsules are left in your intestines then you can have your MRI. I wear a medical bracelet that says NO MRI!