Transesophageal Echo and Transthoracic Echo Training Ultrasound Training Model. Building on the Transthoracic Echocardiography (TTE) Platform, this Model Includes an Articulating Head and Jaw with Realistic Esophagus and Stomach, Microfiber Cleaning Towel, Powder, Syringes, Red, Blue, and Clear Ultrasound Fluid. Blue Phantom products are not returnable. This does not effect exchanges due to defects to the product. Product is covered under 1-year warranty.