Swine breeders - improve your efficiency by detecting pregnancy fast and early with one of the least-expensive pregnancy detectors available anywhere! Uses ultrasound to detect pregnancy as early as 18 days. With practice, you can achieve 100% accuracy at 30 days on healthy animals! Safe - all testing is done externally. Easy, one-hand operation - probe is built right into unit so there are no cables to become tangled. Simple to use - no lights to watch, just listen for the unique sound. This handheld portable unit weighs less than one pound, and operates on a “9V” battery (included). Solid-state circuitry. Acid-resistant plastic housing cleans with soap and water. 100% tested to ensure reliability and accuracy. For swine only (not pot belly pigs).