RoyalTek RBT-1000 - Manual (Page 7)

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1.3. Product Notification
Operating temperature range -20 ºC to +60 ºC
Charger operating temperature range 0 ºC to +40 ºC
Battery Storage temperature range -20 ºC to +50 ºC
Lithium-ion battery lasts more than 8 hours in continuous operation
mode.
Humidity range up to 95% no condensing
1.4. Application
Navigation
Automotive Vehicle Tracking
Personal Positioning
Geographic Surveying
Sporting and Recreation
Consumer wireless GPS
Cellular Phone