LCD Baby Fetal Doppler Heart Monitor Portable Ultrasound Fetal Heart Monitor with 2MHz Probe Alarm Function FHR Curve Display Heartbeat Detector Battery Powered

Description : LCD Baby Fetal Doppler Heart Monitor Portable Ultrasound Fetal Heart Monitor with 2MHz Probe Alarm Function FHR Curve Display Heartbeat Detector Battery Powered Features : 1. Comform to human engineering design, compact and light 2. Low power battery check 3. Battery status indicator light 4. Easy to use and can replace probe 5. Built in speakers and volume control 6. In-Ear earphones socket or output audio signal to a computer or other audio equipment 7. Clear and accurate sound detection 8. High sensitivity changes can be detected with each other 9. Long continuous use(2 AA alkaline batteries for 10 hours) 10. Automatic power off (1 minute later no signal, automatic shutdown) Hand -held obstetrical unit, which can be used in hospital, clinic and home. Specification : Power supply 2 x 1.5V AA batteries (not included) Dimension Approx. 10x13x3.5cm/ 3.94x5.12x1.38" Probe diameter Approx. 2.9cm/ 1.14" Working frequency 2.0 MHz 10% Ultrasonic output power Iob10 mW/cm2 Overall sensitivity 90 dB (Integrated sensitivity 200mm away from the the surface of the probe)While measuring integrated sensitivity, using the doppler frequency (300 50) Hz Reflecting target speed: 10cm /s ~ 40cm /s FHR measuring range No narrower than 50bpm-240bpm ( 2bpm). (Beat Per Minute) FHR accuracy 2 BPM Spatial-peak temp-peak acoustic pressure 0.1 MPa. Negative peak sound Pressure (p_)