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Wireless Thermometer and Hygrometer HR641B

Features:
RF transmission frequency: 433.92 MHZ
RF transmission range: 100 feet (30 meters) line in sight
Temperature sending: Around 40 seconds
Temperature resolution : 0.1℃ (0.2℉)
Centigrade and Fahrenheit Conversion

Main Unit:
1)2-line LCD displays in-outdoor temperature and humidity separately.
2)Display temperature range: -50℃ to 70.0℃(-58℉ to 158℉ )
3)Proposed operating range: -5.0℃ to 50.0℃ (-23.0℉ to 122.0℉)
4)Storage temperature : -30℃ to 70℃
5)Humidity measuring range: 20% to 91%RH
6)Memory maximum and minimum temperature readings
7)Use 2pcs UM-3 or “AA” 1.5V battery
8)℃ / ℉ display conversion
9)Dimension: 132 x 118 x 55mm
Remote Temperature Sensor
1)Display temperature range : -50℃ to 70.0℃(-58℉ to 158℉ )
2)Proposed operating temperature range : -20.0℃ to +60.0℃ (-4.0℉ to 140.0℉)
3)Relative humidity : Up to 100%, condensing
4)LED indicator for transmitting a reading
5)Slide switch for channel selection.
6)Use 2pcs UM-4 or “AAA” 1.5V battery
7)Dimension : 92×60×20 mm
8)Waterproof