Specially designed high sensitive and ergonomic handheld Fetal Doppler suitable for operation in clinics and hospital. Jumper EFD-100A will meet the diagnostic of fetal heart rate using digital LCD display with three processing mode : Real Time FHR, Average FHR, and manual mode. The Jumper EFD-100A produce very clear sound and noiseless audio feedback effect. EFD-100A may also used 9V rechargeable battery, and full charge battery can be used for about a week. When no AC supply available, the rechargeable battery can be replaced with ordinary "Standard 9V" battery, especially useful at the remote area.