Tx14th La Crosse Technology Wireless Temperature & Humidity Sensor, 200 Ft. Wireless Range La Crosse Technology Wireless Temperature & Humidity Sensor, 433 MHz, Outdoor Temperature, Outdoor Humidity, Weather Resistant, Works with La Crosse Technology Weather Station Model: 308-1451, 308-145CA, 308-146, 308-146CA, B86012, C86371, K86319 Dimensions: 2.4" L x 1.3" W x 3.78" H (64 x 36 x 101mm) Interchangeable with TX14TH-LCD, 200 ft. Wireless Range Outdoor temperature range: -40F to +140F (-40C to 60C) Power requirements: 2 "AA" Alkaline batteries (not included)