Features of Fetal Doppler MSLJB01:

Highly sensitive ultrasound and interchangeable waterproof probe
Detect the heart rates of 12th week fetus
Automatic shutdown after 1 minute without operation 
Built-in loudspeaker

Specifications of Fetal Doppler MSLJB01:

Acoustic working frequency: 2.5 MHz ± 10%
Overall sensitivity (200 mm off the probe surface): ≥90 dB
Spatial-peak temporal-peak acoustic pressure: < 0.1 Mpa
Ultrasound output power: ≤ 20mW
Effective area of the ultrasonic transducer active element : 1.57 cm2
FHR display range: 50 – 210 bpm
Resolution: 1 bpm
Precision: ± 2 bpm
Curve display range: 80 – 200 bpm
Power supply: internal
Battery: 1180 mAh lithium battery 
Charging limit: DC 5 V 2A
Work mode: continuous (The device can work continuously for over 6 hours after its battery is fully charged.)
Dimension: 147.0mm x 101.9mm x 31.6 mm
Net weight of main unit: 250 g ± 5 g
Ultrasound coupling agent requirement: density = 1.0g/cm2; speed ≤1.7m/s; impedance ≤1.7×105g/cm2.s; attenuation ≤0.02dB/mm
P_ < 1MPa; Iob < 20 mW/cm2; Ispta < 100mW/cm2
Manufacturing date: See the label.
Service life: 5 years

Medial & Video of Fetal Doppler MSLJB01
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