Features
- Ultrasonic working frequency 
- Nominal sound working frequency: 2.0MHz
- The deviation between sound working frequency and nominal sound working frequency shall be less than ±5％
- Fetal heart rate
- Measuring range: 50 - 240bpm
- Integrated sensitivity
- The sensitivity at the place 200mm away from the surface of probe: > 90dB
- Acoustic pressure at space peak value and time peak value P ( MPa )
- Negative acoustic pressure: P < 1MPa
- Acoustic pressure at space peak value and time peak value: < 0.2MPa
- Acoustic output power
- Ultrasonic output power: < 40mW
- Effective area of sensitive element of ultrasonic transducer
- Operating mode: continuous wave
- Models and functions
- Product models are YK - 90C
- Product without a battery Powered source: Dry Battery
Feature: LCD Display
Pattern Type: Others
Battery: No
LCD Size: 1.5 inch
Batteries Required: No
Technical Feature: Other
0.133 Package weight: 0.163 kg
Product size (L x W x H): 6.00 x 4.00 x 11.00 cm / 2.36 x 1.57 x 4.33 inches
Package size (L x W x H): 8.00 x 6.00 x 14.00 cm / 3.15 x 2.36 x 5.51 inches
Package Content: 1 x Fetal Doppler, 1 x English Manual