Home use fetal heartbeat products AngelsoundsAll to one designPower with dry batteries (9V)The probe taking the principal of fetal ultrasoundTo collect the fetal heart beatSignals of fetusCharacters: Small beautiful appearance, strong ability of processing fetal heart Signals, invulnerable to outside interferenceSpecification: Utrasound frequency: 3.3 MHzAcoustic intensity: < 10mW/CM2Peak negative pressure: <1 MpaOutput beam intensity: <20mW/CM2Dimension: 21cmx16cmx8cmPacking: 43x47x49cm/30pcs
