Designed as a Ultrasonic probe to easy find the FHB and more comfortable for pregnant.
Instruction marks are printed by laser and wont erased by using.
Head phone quality for clear sound and less noise
The option phone cable compatible for almost all apps so you can record by phone and enjoy the apps functions
Small Fetal heart beat indicator.
Easy to use
Heart rate Display ( 25*14 mm)
Clear sound ,and less noise
Can hang it by hang lace
Automatic Display Freezing After remove from the body
Light weight of 80g, batteries included
Runs on standard AAA batteries and continuous working time is 18 hours