The MD6 Bidirectional Doppler with Detachable Transducer is a pocket sized bidirectional Doppler.The pencil style probe and extra long cable (6 feet) are detachable. The MD6 Doppler's features include red and green LED's in the probe tip to indicate flow direction, buttons on the probe for easy operation, and rechargeable NiCad batteries. The MD6 Doppler can also be used with the MD6VR Chart Recorder for printing waveforms. © 2008 D. E. Hokanson, Inc.