All Features:
Wireless Outdoor Temperature (F or C)
Monitors Indoor Temperature (F or C)
Records MIN & MAX Temperature with Time Stamp
Digital Time
12 or 24 Hour Time Display
Can Receive Up to 3 Sensors
Wall Hanging or Free Standing
Detachable Stand Included
 
 
Specifications:

Wireless Outdoor Temperature Range: -21.8F to +156.2F
Indoor Temperature Range: 32F to 140F
Temperature Accuracy: +/- 1.5F
Transmission Range: Up to 80 Feet
Transmission Frequency: 433.92 MHz
Compatible Sensors: TX3U, TX3UP

Power requirements :
Receiver: 2 "AAA" Alkaline Batteries
Sensor: 2 "AA" Alkaline Batteries 
 

Dimensions:
Receiver: 5.1" x 2.47" x 1"
Sensor: 5.5" x 1.625" x 1"