Honeywell Temperature Sensor, Wireless, Indoor, Temperature Rating: 0 - 120 deg F, Accuracy: +/-1.5 deg F at 70 deg F, Humidity Range: 5 - 95% RH, Non-Condensing, Wall Mounting, White, 2-7/8 Inch Length x 1-7/8 Inch Width x 15/16 Inch Depth, Includes: (2) C7189R2002 Indoor Sensors, (4) AAA Alkaline Batteries and Mounting Hardwares