With flat probe sensor , better for veterinary use . ( flat sensor is better when space is limited , or under skin )
This doppler comes with 1 sensor only ( the blue pencil like body is part of the flat probe )

Feature:

Detect the blood stream status of arterial/venous by 8.0MHz, detect the blood flow average velocity, detect the result of finger/toes and part of body's vein anatomies operation.
Detect the blood flow average velocity, detect the result of fingers, toes and part of body's vein anatomies operation; It can be used to listen the temporo-mandibular joints (They become noisy when they start to brake because of the bite problems), assist doctor to check the conditions of the joints and predict the result of treatment.
Built-in ARM microprocessor & real-time displays blood flow velocity waveform;
Choose menu by pressing keys, store 50 curves;
High-speed USB port, can be connected directly to computer to analyze, store, and print the waveform.
Detect the pulse rate and show PR simultaneously

Specification:
Ultrasonic frequency: 8.0MHz±10%
Battery: 7.4V/900mAhrechargeable Lithium
Input voltage: DC 9V 1000mA
Doppler frequency: 100--7000Hz
Display: Color LCD  128×96 dots,  display blood stream average velocity, PK, time, volume and battery
Working temperature: 10-40℃ 
Humidity: ≤80%
Atmospheric pressure: 86--106kPa
Certification: 
The product approved by CE, 

What included :

Doppler , probe , probe cap, charger , carrying case , instruction manual