Item:Item size 54*34*12.5mmDisplay 0.96 OLED digital displayStrap material Replaceable Skin-friendly medical silicone strapStrap length 130mm-175mmHardware parametersChip MT6261RAM/ROM 32MB/32MBGPS chip MT3337GSM frequency 850/900/1800/1900MHz (Only support 2G SIM)GPRS Class 8， TCP / IPSIM Card type Micro SIMBattery 400mA， Removable rechargeable Li-polymer batteryCharging Micro usb 5VPress button Power button， MOM Button， DAD Button (call)Mic High clear silicon markLow power consumption mode is about 7 days (LBS upload data by half an hour once)The common mode is 3-3.5 days (LBS upload the data by 10 minutes once， default)Using time The exact mode is 1-1.5 days (GPS upload data once at every 10 minutes)Operating voltage DC 8~45VGPS positioning time Cold start��26s (open sky)GPS positioning accuracy 10m (2d rm)Gravity Built-in S-Sensor， sport testingCompatibility Support Android & iOSAndroid Phone positioning by Baidu Map， Apple positioning by Gaode MapLanguage (13 languages) English， Chinese， Finnish， German， Russian， Franch， Norwegian， Potuguese， Turkish， Spanish， Italian， Vietnamese， ArabicPackage contents1 x GPS Watch， 1 x User manual， 1 x cable