Features:[High-Class Hardware]: Android 7.1.1 operating system, 1.39 AMOLED screen, 454*454 pixel, 2GB+16GB memory.[Dual Chipsets]: MTK6739 Quad Core + Nordic 52840, more effective and more convenient.[Dual Modes]: Smart Watch Mode+Smart Wristband Mode, it can be switched between the two modes.[4G LTE]: Built-in Nano SIM card, support 4G network and call, high speed data transmission.[8.0MP Front Camera]: High-resolution selfie, its picture is clear and bright, convenient to record your beautiful moments in life![3 Ways Positioning]: GPS/GLONASS/Beidou positioning, help you find the direction faster and more conveniently.[Multi-Sport Modes]: Outdoor running, outdoor walking, indoor running, riding, rope skipping, football, etc.[Health Fitness]: Heart rate monitoring, steps, calories, speed and cadence monitoring.[Long Standby Time]: Standby time is up to 4 days in the wristband mode, don't worry about low battery.[Wide Compatibility]: Support BT 4.0, Android 7.1.1, iOS 8.0 and above.[Main Functions]: 4G Call, BT, GPS/GLONASS/Beidou, WiFi, Multi-Sports Modes, Heart Rate, etc.Parameters:CPU: MTK6739 1.25GHz, Quad Core + Nordic 52840 (Dual Chipset Technology)Screen: 1.39 AMOLEDResolution: 454*454 PixelRAM: 2GBROM: 16GBSIM Card: Single SIM (Nano SIM)Network: TDDB38/B39/B40/B41 FDD LTE2100(B1)/1900(B2)/1800(B3)/850(B5)/2600(B7)/900(B8)/B12/800(B20) TDS CDMAB34/B49 WCDMA850(B5)/900(B8)/1900(B2)/2100(B1) GSM850(B5)/900(B8)/1800(B3)/1900(B2)WiFi: Dual-band (2.4GHz/5GHz), single stream 802.11a/b/g/n MAC/BB/RF, 802.11d/h/k compliantGPS: GPS/GLONASS/BeidouBT: BT 4.0Camera: 8.0MP Front CameraMic/Speaker: YesOperation System: for Android 7.1.1Compatibility: with Android 7.1.1, iOS 8.0 and aboveSensor: Heart-rate monitor, Proximity sensor, AccelerometerBattery Type: Polymer lithium ion batteryBattery: 545mAhStandby Time: About 1 day (Smart Watch Mode), About 4 days (Smart Wristband Mode)OTA Upgrade: YesFor Google Play: YesLanguage: English, Portugus(Brasil), Portugus(Portuguesa), �����ܧڧ�, Espaol, Italiano, Franais, Polski, Bahasa Indonesian, Deutsch, Ti?ng Vi?t, Trke, Hebrew, Arabic, Persian, Hindi, Bengali, Thai, Burmese, Korean, JapaneseFunctions: 4G Network (Global Bands), GPS/GLONASS/Beidou, with Google Play, Voice Search, Offline Music, WiFi, Weather, Clock Faces Notifications, Phonebook, Alarm, BT, Browser, Calendar, Camera, E-Book, MP3, MP4, Heart Rate Monitoring, Pedometer, Call Reminder, Answer Call, Dial Call, etc.