CONTEC Sonoline B 3mhz Portable Baby Heartbeat Monitor Doppler with Display Screen Pregnancy Mother Test Kits
It contains components of ultrasonic signal transmitter and receiver, analog signals processing unit etc. It has audio output and can be connected with earphone or recorder with audio input. Heartbeat monitor Dimension & Weight: 330 × 230 × 70 mm .0.5kg Package Content: 1 x doppler 1 x English user's manual 1 x Gel