High-quality medical Doppler fetal favorite essential obstetric outpatient ward medical equipment Chenhao TX268 Doppler fetal favorite won the 2011 "Mayor's Cup" Qingdao Industrial Design Competition Bronze Award for Product Design class patent number: 2011300045855.3 patented product Features l large-screen color LCD, digital large and clear l using DSP technology, more advanced and accurate l high-quality high-power output, the sound loud and clear l large capacity rechargeable battery, optional battery l instantaneous average fetal heart rate and fetal Heart rate charged display screen display l, l full display and display power shortage after a set time to be determined automatically shut l FHR overrun warning technical indicators l ultrasound frequency: optional 3.0MHz, 2.5MHz or 2.0MHz probe, Standard frequency and average frequency of error is not less than ± 10% l ultrasound output intensity: <5mW / cm2 l comprehensive sensitivity:> 100dB l fetal heart rate measurement and display range: ≥40bpm / min-210bpm / min l FHR Accuracy : less than ± 10% l Power: 4.8V NiMH rechargeable battery (standard) l Continuous working time: rechargeable battery> 4 hours; battery> 1 hour l Operating temperature: 5 ℃ -40 ℃ l Relative Humidity: 30% -80 % l atm: 70kPa-106kPa configuration in Listing 1, the host of a 2, a 3 probe, a charger, a 4, a 5 manual, certificate of a major product categories: Doppler fetal favorite, the fetus / mother monitors, multi-parameter monitor, postpartum rehabilitation treatment, the mother of fetal central monitoring station, provide OEM, ODM services.