The compact UW7 Bidirectional Doppler has patented red and green LED's on the probe tip indicating the direction of blood flow The UW7 can be powered on and off from the detachable transducer. These features make it easy for the end user to control. The pencil style probe and cable are detachable for easing cleaning and storage. The built-in speaker provides high quality sound, featuring Dynamic Noise Reduction. The UW7 is powered by rechargeable NiCad batteries. © 2008 D. E. Hokanson, Inc.