ZD8 Ultra Max+ Smart Watch Series 8 49mm Titanium Alloy 520*585 2.2 inch BT Call NFC ECG Compa IP68 Waterproof Smartwatch Men ZD8 Ultra Max+6 differences with ZD8 Ultra Max : 1:ZD8 Ultra max is 2.08 inch,ZD8 Ultra Max+ is 2.2 inch 2.the resolution of the ZD8 Ultra max is 420*485, andZD8 Ultra Max+ is 520*585.The screen is clearer and more delicate. 3.ZD8 Ultra max battery capaticy is 380mah ,ZD8 Ultra Max+ is 420mah 4.ZD8 Ultra Max+ add the Compa function 5.ZD8 Ultra Max+ upgraded the New watch UI 6: ZD8 Ultra Max+ have 2 straps (Black: black ocean + black Alpine; Orange: orange ocean + orange Alpine; Grey: grey ocean + black Alpine) Selling Points: *1:1 49mm*2.2 inch Retina screen*IP68 Waterproof*Heart rate monitoring*ECG monitoring*Blood oxygen monitoring*Exercise monitoring*Sleep monitoring*420mAH large capacity battery.*NFC ACCESS CONTROL*Voice Aistant *Compa *GPS tracking Parameter: Chip :AXCompatible System:Compatible SystemFlash size:128mbAndroid OS:Supports Android 4.4 and aboveIOS :iOS 10.0 and aboveHeart Rate Sensor:Zhangheng BD1662_I2CBluetooth Dual:Bluetooth 5.0Waterproof Level:IP68Craftsmanship :zinc alloy+IMLScreen size:2.2 inch full round screenScreen Resolution:520*585Screen type:IPS full view color screenWristband material:silica gel,nylonBattery Type:lithium batterybattery voltage:3.7Vbattery capacity:420mAhcharging method:Wirele chargingapp:ZORDAI Function: Breath training, dial push,compa,stopwatch,brightne adjustment,multi-sports mode, sleep, heart rate, information, remote music, remote photo, weather, search for mobile phones (connected to mobile phones),Bluetooth calls,Bluetooth music playback, paword protection, calculator, Split screen display, quick widgets, weather, maager, , my QR codeGPS tracking,NFC, ECG, blood oxygen, blood preure, AI voice aistant APP supported languages:Chinese, English, German, Ruian, Spanish, Portuguese, French, Japanese, Italian, Polish, Korean, Arabic, Persian, Thai, Vietnamese, Traditional Chinese, Greek, Romanian. Turkish, Hebrew, Czech Watchsupported languages:English, Chinese, Traditional Chinese, Danish, Greek, Latin, Romanian, Turkish, Hebrew, Czech, Polish, Spanish, German, Ruian, Portuguese, French, Japanese, Italian, Vietnamese, Korean , Arabic, Persian Packing List: originalsmart watch*1 wirele charging *1 user manual*1 manual*1 Detailed Pictures: