Features of Pocket Fetus Doppler MSLJB04:

1.Battery status indicator 
2.Low power inspection of the battery
3.Built-in speaker
4.Output for earphone
5.The probe can be changeable
6.Probe inspection 
7.Backlight
8.Auto shut off
9.Two pieces of standard 1.5V alkaline batteries available which can work no less than 10 hours.

Specifications of Pocket Fetus Doppler MSLJB04:
1. Physical Characteristic
Size: 130mm (Length) ×100mm (Width) ×36 (Height) mm 
Weight: About 250g (including batteries)
2. Display: 44.5mm×23mm LCD display
3. Backlight: The two statuses can be alternated: turn off/on the backlight. 
4. Suitable Using Range: Suitable for use after the 16th week of pregnancy
5. FHR Performance
FHR Measuring Range: 50~210BPM (BPM: beat per minute) 
Resolution: 1bpm 
Accuracy: ±2bpm
6. Power consumption: ≤0.7W
7. Auto Shut-off: After 1 minute no signal, power off automatically.
8. Battery Type Recommended: Two pieces of 1.5 V DC batteries (SIZE AA LR6).
9. Ultrasonic Probe:

Working Frequency: 3.0MHz±10%
Working Mode: Continuous wave Doppler
Overall sensitivity :＞ 90dB
Spatial-peak temporal-peak acoustic pressure: ＜0.1MPa
Output power: ＜20mW

Medial & Video of Pocket Fetus Doppler MSLJB04
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