??Vascular Doppler with 8mhz probe<br /><br />RFD-B2 handheld Doppler can meet routine examination requirement of obstetricians， midwives， pregnant women and vascular. It is a high performance model with FHR digital LCD display. It has three heart rate processing modes: real-time FHR display mode， averaged FHR display mode and manual mode. It has audio output， and can connect with earphone or recorder with audio input. RFD-B2 has a slim， power saving and interchangeable ultrasound probe. <br /><br />Features for fetal doppler:<br />- Easy to use<br />- Accurate FHR detection and LCD display with the backlight on or off<br />- Built-in speaker for listening to the heartbeat without headphones<br />- Output for headphones<br />- 2 AA size batteries<br />- Low battery consumption and Auto OFF feature<br />- Battery icon indicates how much battery life is left<br />- Fetal Doppler Displays Three Modes:<br />Mode 1: This mode displays fetal heart icon when fetal heart beat is detected and also displays the real-time heart rate numerically.<br /><br />Mode 2: This mode displays the fetal heart icon when the fetal heart beat is detected and averages the fetal heart rate for a more stable reading.<br /><br />Mode 3: This mode can calculate an average fetal heart rate over a specific period of time by manually pushing a button to start and stop the time.<br /><br />Probe features: <br />- 2MHz or 3MHz water resistant Doppler probe ensures a high-sensitivity probe that cannot be damaged by transmission gel<br />- Doppler Cord is rubber coated to protect it from the elements and coiled for plenty of stretch<br />- Doppler Probe easily detatches from the main unit for storage<br />- Earphone jack for listening or attaching fetal doppler to the computer for recording the heartbeat<br /><br />Specification for fetal doppler:  <br />LCD Display Dimension<br />39x27mm<br />Speaker power: 1 W<br /><br />Power Supply<br />Built-in rechargeable battery<br />DC， Working voltage: 7.4V， Li-ion battery<br />Continuous operating time: > 5 hours<br />AC recharger<br /><br />Ultrasound<br />Frequency: 2.0MHz continual wave<br />Intensity: <2mW/cm2 of 2.0MHz<br />P: <0.35MPa<br /><br />FHR<br />Display: LCD display<br />Measurement range: 30~240BPM of 2.0MHz<br />Measurement accuracy: ÷1% or ÷1BPM<br /><br />Dimension & Weight<br />330 ≠ 230 ≠ 70 mm<br />0.5kg<br /><br />Package Content:<br />- 1 x RFD-B2 Fetal doppler<br />- 1 x English user's manual