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• Ultrasound working frequency: 1MHz ± 5%
• Fetal heart rate: range: 50-210 bpm
• Resolution: 1 bpm
• Accuracy: ± 2 bpm
• Alarm:
- high limit: 160 bpm
- low limit: 120 bpm
• Ultrasound intensity: < 5 mm/cm2
• Dimension: 145 x 74 x 29 mm
• Weight: 350 g
• Power supply: 3 AA Batteries