D240X Ultrasound Detector DVD Repel pest birds such as

Repel pest birds such as geese

General Features

To hang a net

and richly illustrated with some 200 color photographs

- Covers up to 3

D240X Ultrasound Detector DVD Repel pest birds such asVery popular heterodyne and time expansion detector with backlit, large digit, accurate digital display, showing the tuned frequency in the heterodyne mode. The frequency and volume controls are on the side of the case, making it easy to adjust. Using stereo headphones, the heterodyne signal is heard on the left channel and the time expansion signal on the right channel. When the built in speaker is used, a switch is used to select the heterodyne or