Endoscopy using a pill sized (11mm x 26mm, weight ~ 4 grams) capsule endoscope was first reported by Iddan. The capsule can be swallowed and transmit images from various part of the gastrointestinal tract as the capsule traverses the gastrointestinal tract. The main indication at present is the visualization of the small intestine, especially for locating sources of bleeding that are beyond the range of gastroscopy and colonoscopy. The battery of the capsule lasts for up to 8 hours.