LCD display, and with EL backlight;

Display modes: Numerical Display of FHR (Fetal Heart Rate);

2.0 MHz supersonic working frequency with a lower noise and better sound;

1.0 & 2.5 MHz Doppler probe replaceable & optional;

With alarm function, and the alarm limits can be set;

Built-in speaker and audio output

Data record can be uploaded to PC

Automatic power off

3 AA alkaline or rechargeable batteries or AC/DC adapter (optional)