Features: GPS signal auto-timing one switch function; Heart rate meter(Bluetooth V4.0) compatible with IPHONE 4S and above IPHONE IPAD 3 and above IPAD; Supports a variety of app; With 3D pedometer compass stopwatch timer(1100s); Countdown three groups of alarm Settings 3-Mode GPS 3-Mode sport auto-DST hour function: 12/24 hour time format; Displays calendar week automatic global time zone setting; The second time/zebra time function; Application software can manage and export trajectory calorie calculation upload pictures in accordance with the time historical records and the query user data set auto-sleep energy saving function with indicator calendar LED backlight.