TFT fetal Doppler, Daptone

The Bestman BF-500D+ is a pocket fetal Doppler that detects the baby's heartbeat by ultrasound. It has a colour (TFT) screen with a backlight that can be switched on or off, and a headphone socket.

It comes with a 2.0 MHz probe as standard; probes of other frequencies are options. Upper and lower limits can be set for the fetal heart rate, with a sound and light alarm outside them. It switches itself off after a minute without a signal and warns when the battery is low.