BPL FD-04 is a foetal heartrate detector with a 2.5Mhz highly sensitive ultrasound probe which can detect the foetal heartrate accurately even in the early period of gestation. It accurately detects the foetal heartrate being absolutely safe for the foetus as well as the mother. BPL FD-04 is equipped with dual display mode, dual audio output and visual alarm in case of any inconsistence recorded. The Lithium battery of this portable device is rechargeable with a medical grade adapter that comes with this device. The device shuts down automatically post 1 minute of no operation thereby preserving battery life.