This Hp Sonos 4500 Obgyn is the best type of ultrasound machine available on the market. It has many excellent features and offers streamlined, intuitive features that are better that your typical ultrasound machine. Yet, it is compact and easy to use for the average person to use. As a robust ultrasound machine, it delivers the best features to capture your attention for all types of use. Compare Hp Sonos 4500 Obgyn with Dynatron, Medison, Sonosite, Terason, Esaote, Chison, Apogee, Philips, Fukuda Denshi, Siemens, HP, Diasonics, Toshiba, GE, ATL.