2.4'' ultra big LCD displays the FHR dataa, graphic ( dual interfaces ), real-time, date and battery capacity, volume of sound and alarm indicator etc..

Built-in rechargeable battery can work continuously more than 4 hours

TFT  LCD display for use conveniently at night;

Abnormal audible and visual alarm, with FHR data turning from green to red;

Automatic power off (one minute) when there is no signal to save the battery power;

only 270g, can be carried with conveniently with an earphone, gllus and portable handbag;

Built-in speaker, collocate with earphone jack;

USB interface for normative collocation, analysis software for option;

Various frequency probes for different use.

Pulse Doppler, normative collocation: 2.0MHz probe.