Easy to read LCD can function with the backlight on or off Built-in speaker for listening to the heartbeat without headphones Headphone jack for listening to the heartbeat or attaching to the computer with the included accessory for recording the heartbeat Requires 2 AA batteries Low battery consumption and Auto OFF feature Battery icon indicates how much battery ...Read More

Sonoline B handheld Doppler can meet routine examination requirement of obstetricians, midwives, and pregnant women. It is a high performance model with FHR digital LCD display. It has three heart rate processing modes:real-time FHR display mode,averaged FHR display mode and manual mode. Both of the models have audio output, and can connect with earphone or recorder with audio input. Sonotrax has a slim, power saving and interchangeable ultrasound probe. ...Read More