21 Jun 2016
F900 Abbreviated instruction. • This watch is Mode for setting time and calendar manually. For details, see The hand returns automatically in 10 seconds without pressing the button. . Checking the reception result of the satellite signal. 1.
24 Oct 2017
Before using the watch, read this instruction manual carefully to ensure correct use. Satellite Wave-GPS Keeps high accuracy without time signal reception.
24 Oct 2017