• Wireless sensors broadcast to the monitor from up to 100-ft (30M) away without obstructions, using a wireless RF signal.
• Displays the local and remote temperatures in ºC or ºF, recalls min/max on both, and indicates when the batteries are low in both the sensors and monitor.
• It also displays user adjustable, audible and visible, Hi / Lo Alarms, on both temperature and RH, for the base unit and the remote sensors. The monitor comes with one sensor that also displays local RH and temperature and stands on a bench or wall mounts. Each monitor can be paired with up to 3 sensors with the additional sensors sold separately.
• Comes with 2 x AAA batteries for the monitor and 2 x AA batteries for the sensor. 
• Dimensions: Monitor: 3 1/8" x 3 1/8" x 1 1/4" (80 x 80 x 30 mm) Sensor: 4 1/2" x 2 1/2" x 1" (110 x 60 x 30 mm).
• Weight: Monitor: 4 oz (113 g) Sensor: 4 oz (113 g) with batteries.
• 5 year warranty

Thermometer/ Hygrometer Indoor Display Unit @ Operating Temperature: -10°C to 60°C 

• Range: 0.1°C 
• Resolution: ±1°C
• Accuracy: ±1°C
• Operating RH%: 0 to 95% @25°C
• Resolution:1% RH
• Accuracy:±5%

Remote Wireless Sensor @ Operating Temperature: -20°C to 70°C

• Range: 0.1°C
• Accuracy: ±1°C
• Operating RH%: 10 to 95% @25°C  
• Resolution:1% RH
• Accuracy:±5%
• RF Transmission Frequency: 433 MHz
• RF Transmission Range: 30 meters in open area
• Temperature Sensing Rate: 43 to 47 seconds