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Sonotrax Basic A Doppler (w o Probe) Flexibility Rotation Testers Mid Calf 23 Style:Pair (Left & Right) Mid Calf 23 Small blood sample: Only 1 micro liter is required Ultrasonic Pocket Doppler * Easy to use * Compact design * Interchangeable waterproof probe (sold separately) * Built in audio recorder * Large backlight LCD display * Accurate FHR detection with high fidelity sound effect * Support waterproof probes for both obstetrical and vascular usage * Auto Average and Manual working modes * Various power supply solutions * Automatic power off to save power * 9V alkaline battery
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