Product Details:

Display: LCD Screen

Performance: FHR Value, Volume, FHR Mode,
Battery Status Range&Accuracy: FHR Measurement Range: 50-210 bpm
Accuracy:±2bpm

Measuring Modes: Real-time, Average and Manual Countng
Ultrasound Frequency: 3.0MHz
Dimension: 260x96x35(mm)

Net Weight: 250g±5g

Backlight and Speaker: Backlight, Adjustable Volume
Battery Type: 7.2VNI-MH(Rechargeable)or AAx3