UW Long-Range Backscatter Farm (IMAGE) University of Washington Caption The communication range of many low-power devices is limited to several feet. The UW's long-range backscatter system's sensor (shown in the foreground) was able to communicate with a receiver (held in the distant background) throughout a one-acre farm, a 4,800-square-foot house and an office area covering 41 rooms. Credit Dennis Wise/University of Washington Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.