IN Temp (°F) OUT Temp (°F) MIN & MAX Temp Dimensions: Receiver: 4.92" x 2.28" x 1" Sensor: 5.5" x 1.6" x 1" All Features: Wireless Outdoor Temperature (°F) Monitors Indoor Temperature (°F) Records MIN & MAX Temperature Can Receive Up to 3 Sensors Wall Hanging or Free Standing Detachable Stand Included Specifications: Wireless Outdoor Temperature Range: -21.8°F to +157.8°F Indoor Temperature Range: 32°F to 140°F Transmission Range: Up to 80 Feet Transmission Frequency: 433.92 MHz Compatible Sensors: TX3U, TX2U, TX6U Power requirements : Receiver: 2 "AAA" Alkaline Batteries Sensor: 2 "AA" Alkaline Batteries Accuracy: + or - 2deg.