... and outside diagnosingSensitivity:monitor 12 weeks above unborn fetal heart beat.Economic:adopt with proffessional recharger battery,for effective cost ... temperaturre:10-40Sensitivity:monitor 12 weeks above unborn fetal heart beat.Economic:adopt with proffessional recharger battery,for effective ... a hook,light weight,portable.Can transmit the fetal heart signal to the monitoring centre system with a ...