HI-dop is the Doppler for not only Ob/Gyn but also Physicians, Surgeons, and other clinical specialists. Hl-dop let doctors hear and check the sound of blood flowing change made by extract on Doppler frequency of singals reflected from blood vessel after applying ultrasound at the region of blood vessel. • FUNCTIONS - Sound from built-in speaker - 4,5,8MHz Doppler available • FEATURES - Compact and Light - High-Sensitivity Doppler probe - Ergonomie Design - Clean Sound - Easy to Use - Low power Consumption - Long Time to Continuous Use (6hours)