This gauge design eliminates the normal wire connection from the rain gauge to the indoor display. The battery operated transmitter operates up to 100 meters away. Just locate the gauge in an open area and read the rainfall amount on the indoor display. The 203mm diameter collector meets NWS specifications for statistical accuracy. Every time the bucket tips, a count is transmitted to the indoor display and the gauge empties. You never have to empty the gauge. Each tip of the bucket shows one hundredth of an inch on the indoor display.