The HP 21369A is an ultraband Omni-plane II TEE ultrasound transducer probe. This trans esophageal echoscope has a frequency range of 4-7MHz and is used with adult and pediatric applications. The HP 21369A is compatible with the HP Sonos 4500, 5500 and Image Point series ultrasound systems. This probe is available from our company in used and fully refurbished condition.