Measurement range: Parent unit: Temperature: 0.0 - +60.0 °C; Humidity: 20 - 90% RH; Interior: Temperature: -4 - +140 °F (-20.0 - 60.0 °C); Humidity: 20 - 90 % RH (under 0 °C)
Resolution: [Temperature] 0.1 °C [Humidity] 1% RH
Measurement accuracy: [Temperature] ±1 °C (+0.1 - +39.9 °C), ±2 °C (others) [Humidity] 5% RH (31 - 80% RH), ±10% RH (others)
Wireless communication frequency: 426.025MHz
Maximum Communication Distance: Approx. 27.6 ft (80 m) (See Through State)
Communication period: 1 min
Power supply: Parent unit: AA batteries x 3, Child unit: AA batteries x 3
Battery Life: Approx. 1 year (when using alkaline batteries) Approx. 1 year (when using alkaline batteries). *The battery life may be shorter depending on the environment where radio waves are difficult to reach places
Dimensions and Weight: Main unit: W 3.7 x H 5.5 x D 0.8 inches (95 x 140 x 20 mm), approx. 4.9 oz (140 g) (not including batteries); Child unit: W 2.5 x H 4.8 x D 0.9 inches (63 x 122 x 22 mm), approx. 80 g) (not including batteries)
Accessories: Instruction manual (English language not