GPS Navigation Tracker Portable Handheld Digital Navigation Altitude Meter Temperature IPX4 Grade Waterproof

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?ACCURATE NAVIGATION?GPS dual system compatibility, two star positioning function, speed, distance, 9 sets course reversal/return records.
?MULTI FUNCTION?It shows many important data such as temperature, humidity, time, date, alarm clock, flashlight function, built in rechargeable lithium battery, IPX4 waterproof grade.