Product Details:

Bluetooth fetal doppler;  
Measure/track/share data of the baby heart rate from the mobile device(both Android & iOS system) via bluetooth connection or data line using the Angelsounds APP;Check the history;See the trends

Measuring Mode: Real-time
Ultrasound Frequency: 2.0MHz Dimension: 109x109x85(mm)
Net Weight: 99.S±Sg
Vollrme: Adjustable
Battery Type : 7 .4V Lithium(Rechargeable) Data Transmission: Bluetooth