Dell KM713 Owner's Manual page 13

Environmental
Operating temperature 0 °C to 40 °C
Storage temperature
Operating humidity
Storage humidity
2.4 GHz Wireless
Radio transmission
Range
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-40 °C to 65 °C
90% maximum Relative Humidity, non condensing
95% maximum Relative Humidity, non condensing
Bi-directional, Enhanced Shock Burst™
Up to 10 meters
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