Application range
This series of pocket Doppler/Pulse Oximeter is designed to meet routine examination requirements for pregnant women in hospital, clinic, home etc. The Doppler uses ultrasound technique to detect Doppler sounds from the fetus as early as 10
weeks of pregnancy to the baby’s first moment of life. This unit is available in 3 models, displaying only the Fetal Heart Rate value (Model AV-500A), Fetal Heart Rate value and curve (Model AV-500B) and Fetal Heart Rate value and curve as well as the maternal SpO2 and Heart Rate (Model AV-500C).  

Feature set
• Compact and light weight, easy to operate
• Accurate fetal heart rate (FHR) detection
• FHR displayed with value
• FHR displayed with curve (AV-500B/C models only)
• Maternal SpO2 and heart rate (HR) (AV-500C model only)
• Advanced digital signal processing (DSP) technique is applied for real-time
  calculation of FHR
• High sensitive 2MHz transducer, low ultrasound power
• Date and time display, battery capacity indicator
• Memorable speaker volume control
• Auto power off after 1 min without operation
• Built-in speaker and ear-phone output
• All models are compliant with EU Directives IEC-601-1 (CE Marked)

Models and standard accessories
• AV-500A : FHR Value Display Screen, 1x AC Adapter, 1x Transmission Gel, 1x Li-ion Battery
• AV-500B : FHR Curve and Value Display Screen, 1x AC Adapter, 1x Transmission Gel, 1x Li-ion Battery
• AV-500C : FHR Curve and Value Display Screen, SPO2 probe for Maternal monitoring of SPO2 and HR, 1x AC Adapter, 1x Transmission Gel, 1x Li-ion Battery

Technical specifications    
               

Ultrasound Working Frequency	2.0MHz ± 5%
Working Mode	Pulse Wave Doppler
Measurement Range	50 ~ 210 bpm
Accuracy	± 2 bpm
Resolution	1 bpm
Sound Pressure ( P_ )	< 0.1 Mpa
Display	60 x 37mm LCD
Speaker Power	0.5~1W
Battery Life	350 exams of 1 minute
Net Weight	0.29 kg
Dimension	13.0 x 8.5 x 3.0 cm