Specifications: Working Temperature: 5 - 40 Deg.C/41 - 104 Deg.F Storage/Transportation Temperature: -20 - 55 Deg.C/-4 - 131 Deg.F Working Humidity: 15 - 85 percent Storage/Transportation Humidity: 10 - 93 percent Atmospheric Pressure: 86 - 106kPa Integrative Sensitivity: Not Less than 90dB FHR Measuring Range: 50 - 210 BPM (BPM: beat per minute) Accuracy: +/- 2 BPM Working Frequency: 2.125 - 2.875 MHZ Spatial-peak Temporal-peak Intensity: Less than 21.7kPa Ultrasonic Output Intensity: Less than 10mW Power Supply: 2 AA Batteries (not included) Technical Feature: Waterproof Dimensions and Weight: Product weight: 0.2060 kg Package weight: 0.3360 kg Product size (L x W x H): 10.00 x 3.00 x 14.00 cm / 3.94 x 1.18 x 5.51 inches Package size (L x W x H): 20.50 x 7.00 x 13.50 cm / 8.07 x 2.76 x 5.31 inches Package Contents: 1 x Fetal Doppler, 1 x English Manual
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