Many modern homes have up-to-date clocks or mini weather stations that depend on radio-transmitted data to stay calibrated and current. The La Crosse TX4U works outdoors by sensing temperature and humidity and transmitting that information to an indoor station. It can transmit to a base up to 80 feet away. The TX4U can be added to augment information coming to La Crosse units already in operation. Remove batteries from base units first and activate sensors; then replace batteries in base units and press no buttons until a display appears. Multiple sensors can be assigned a number so that it will be clear which information from which sensor is displayed. The TX4U operates on two AA batteries. Its housings are made of durable, neutral-tone plastic. The sensor works with all La Crosse weather clocks and stations except the Professional Weather Center Series: WS-2010, WS-2210, WS-2310, WS-2315 and WS-2510. For options in wall mounting, two screws and screw anchors and a strong adhesive tape are included. The TX4U measures 2-1/2 by 3 by 4-3/4 inches. La Crosse provides a one-year limited warranty on its sensors. Each sensor comes with a detailed instruction sheet. --Garland Withers
