SPECIFICATIONS

suitable for pregnant women over 16 weeks
shell material ABS
power 9 Volt battery
operating temperature 5°c-40°c
storage temperature -10°c- 55°c
rated frequency 2.0 Mhz± 15%
probe effective area 1.57 cm2± 10%
probe ultrasonic power ≤5mw/cm
measuring ranges 50-210 bpm
error ranges ± 2bpm
continous working 8 hours
ultrasonic output < 20mw