Professional Fetal Doppler Jpd-200c CE Marked

Jumper patent Fetal doppler JPD-200C CE marked. Two probe, adapt for diffrent period of pregancy. Why two probe? 3.3 MHz can be used for early time of pregancy. Cause the higher ultrasound frequency, the wider the probe can detect. In the early time of pregancy, the amniotic fluid in the Stomach is not too much, there is less disturbance when detecting, we just need a 3, 3MHz probe which can detect widly, it is more convenient to find the fetal heartbeat. 2.2 MHz can be used in other period of pregancy, the lower ultrasound frequency, the deeper the probe can detect. When fetus grows up, its skeleton becomes more and the aminiotic fluid in mother's stomach becomes more. The disturbance becomes stonger, a 2.2MHz probe will be more helpful. Most company use a balanced ultrasound frequency, 2.5MHz, that's not the best. Features: Adopting with solid and durable, anti-shock and anti-falling down probe. Ultrasound dosage is under 50% of the safe standard. Huge capacity battery, work more than 12 hours after full chargeSingle key control. Automatic battery recharge and protection. Can acquire fetal heart rate of fetus 9 weeks up. According to difference of pregnant week, users can select 2.2MHz or 3.3MHz probe to get more clear fetal heart beat soundSpecification: Probe: Solid and durable, anti-shock and anti-falling downUltrasound frequency: 3.3MHz or 2.2MHzUltrasound intensity: <2.5mW/cm2Display: LED, display real-time FHRPower: AC 220v 50Hz, DC18V. (On request)Rechargeable battery: 1100mAh(can work more than 12 hours continuously)Size: 240mm*160mm*115mmWeight: Main body: 1.12Kg, charger: 0.64kgPackage: 4pcs/carton, carton size: 58*41*40cm, weight: 12.5KG