Product Details:

Display: LCD Screen
Perfomance: FHR Value
Range&Accuracy: FHR Measurement Range: 50-210 bpm
Accuracy: ±2bpm
Measuring Mode: Real-time
Ultrasound Frequency: 2.5MHz
Dimension: Main Body: 122.5x 59x37 .4(mm)
Pedestal: 92x98x46(mm)
Net Weight: Main Body: 74g
Pedestal: 65g
Backlight and Speaker: Backlight, Adjustable Volume
Battery Type: IEC6F22 9V alkaline