19
NOTE:
The following specifications are subject to change and
are only noted as a point of reference.
DISPLAY
LCD Size
32mm X 26.1mm
ULTRASOUND
Ultrasonic emitting frequency:
3MHz
Overall sensitivity at the distances
200mm from the face of the probe
（
Doppler frequency:300±50Hz,Targe
velocity: 10cm/s~40cm/s
）
≥90dB
Spatial-peak temporal-peak acoustic
pressure
<1MPa
Output power
<20mW
Effective area of the ultrasonic
transducer active element
4.92cm
2
The acoustic coupling medium for
normal use:
ph:
5.5~8,
Acoustic
impedance:
1.5*10
6
~1.7*10
6
Pa·s/m
FHR PERFORMANCE
FHR Test Range:
50~210 bpm (Beat / Minute)
Resolution:
1 bpm
Accuracy:
± 2 bpm
AUDIO OUTPUT
Audio Output Power:
<0.5 W
Audio Out Socket:
Φ
3.5mm
BATTERY
Battery Voltage:
4x1.5V
Type:
AAA 1.5V alkaline
