Fetal doppler (jpd-100a) Fetal heart doppler detector jpd-100a New product: lcd displays fhr(jpd-100a), delicate, portable, user-friendly With speaker, for doctor use Ultrasound frequency: 2.0mhz, 3% discrepancy Can detect 16 weeks fetus Power supply: 3 pieces of 5# battery, can working for 10hours after full charged. Packing: 20*19*5.2cm(1set) 56*42*24cm(20sets) 0.49kg/set
