Safety standards: 1.Symbols IEC 60601-1 "Medical electrical equipment Part I: General requirements for safety" 2.Comply with IEC 60601-2-37 "Medical electrical equipment - Part 2-37: Ultrasound diagnostic and monitoring equipment safety requirements" 3.Comply with IEC 60601-1-2 "Medical electrical equipment Part 1-2: General requirements for safety Collateral standards: electromagnetic compatibility requirements and testing" Specification: Size: 138mm x 96mm x 32mm Color: Blue Weight: 150±20g (with battery) Working Environment: Temperature: 5 ℃ ~ 40 ℃ Humidity: ≤ 80% Atmospheric Pressure: 86KPa ~ 106KPa Storage and Transportation: Temperature between -10 ℃ ~ 55 ℃ Humidity:＜93% RH Atmospheric Pressure: 86KPa ~ 106KPa Display Screen: 35mm x 28mm Power: DC 3V (2 x AA) alkaline batteries General Sensitivity: At a distance of 200mm from the probe surface, the general sensitivity is 91 dB Display Range: Shows the range of 50-210bpm. In the range of 50-210 bpm, the error is ± 2bpm (digital display) Ultrasonic Output Power: 20mW Skin Irritation: None Sound Speed: 1520-1620m/s Acoustic Impedance: 1.5-1.7x106Pa.s/m Acoustic Attenuation: 0.05dB/(cm. MHz) Viscosity: 15Pa.s PH Value: 5.5-8 Working Frequency: 2.5MHz±15% Peak Negative Pressure: 20.0KPa Output Beam Intensity Lob: 8.51mW/cm2 Spatial peak time average derived sound intensity Ispat: 7.00mW/cm2 Package: 1 x Main Monitor 1 x Ultrasonic Transducer 1 x User Manual Attach the probe to the abdomen to locate the position and find out the best direction to the heart. After hearing regular heart sound, the FHR value will display on the screen in real time. Time weeks: Not less than 12 weeks.

Easy to Use :Easy to use digital display at home. Lightweight and Portable Built-in : Speaker with volume control, on / off switch, volume control, headphones and speaker are all good. Easy and Convenient to Use : With large backlight LCD screen, high fidelity, clear sound. Nice sound : Listening to your baby's sounds is like music to a mother's ears..Fetas Heatbeat Doppler Monitor (pink) Highly sensitive and accurate probe High fidelity volume controls Durable and hygienic ABS materialEasily readable with backlit widescreen Dual modes: External sound or Earphone No radiation, safe to use