1: Display Screen: 25mm*15mm.
2: Ultrasound frequency: 3.0MHz
3: Output intensity of ultrasound: <10Mw/cm2
4: Scope of FHR measurement display: 40-220bpm
5: Accuracy of FHR Measurement: 1bpm
6: Power of Voice Output: 1W
7: Ranges of Voice Output Frequency: 500-3000 dB
8: Working temperature: 0-40degree
9: Relative huity: 30%-80%
10: Scope of Atmospheric pressure: 70kPa-106kPa
11: Power Supply: 9.6VNiMH rechargeable batteries
12: Input range of adapter: AC100V-240V, 50/60Hz
13: Continuous working time: 6 hours
14: Dimension: 170mm*73mm*28mm
15: Net weight: 750g