VWAR TANK Z1 Smartwatch: 

The First IP68 Waterproof Smartwatch with Aerospace Grade Titanium Bezel

Hardware Specifications

• CPU: Spreadtrum SL8541E, Quad-core A53 1.4GHz
• Memory: 4GB/2GB RAM + 64GB/16GB ROM
• SIM Card: Independent standby, hands-free calling, Nano SIM
• Frequency Band:
  • FDD: B1/B3/B7/B8/B20
  • TDD: B34/B38/B39/B40/B41 (4G)
  • This smartwatch only supports SIM bands in Europe, Asia, and Africa. In North and South America, it can be used with WiFi or by connecting to a mobile phone's Bluetooth hotspot.
• Screen: 1.43 inch AMOLED, 466*466 round screen
• Camera: 2 million high pixel camera
• Bluetooth: BT4.2
• WIFI: Single band 2.4GHz, supports 802.11b/g/n
• GPS: Supported
• Waterproof: IP68 ( Due to SIM Slot, don't suggest swimming)
• Heart Rate Sensor: HX3918
• Step Counting: Supported
• Charging: 4 PIN Magnetic cable
• Battery: 800mAh polymer battery
• Waterproof: IP68 (Note: Due to SIM slot, not recommended for swimming)
• Android System: Android 8.1.0

Physical Specifications

• Smartwatch Dimensions: Diameter 50.5mm, Thickness 13.7mm
• Strap Material: PU material
• Strap Dimensions: Width 22mm, Total Length 265mm
• Color: Black

Software Specifications

• Operating System: Android 8.1.0
• Menu Options:
  • Phone, contacts, SMS, settings
  • Heart rate, blood oxygen, breathing training
  • Browser, camera, gallery, calendar, alarm clock
  • Music, recording, file management, sports, app store
• Sports Modes:
  • Outdoor running, outdoor walking, indoor running, cycling
  • Basketball, football, table tennis, badminton, skipping rope
• Settings:
  • Network & Internet, Connected Devices, Apps & Notifications
  • Battery, Display, Sound, Storage, Location, System, Version
• Health Features:
  • Heart rate, blood oxygen, step counting
• Network and Internet Features:
  • WLAN, Hotspot and Network Sharing, Airplane Mode, Mobile Network
• Apps and Notifications:
  • Default apps, permissions manager, special app permissions
• System Features:
  • Language and input method, date and time, reset
• Languages Supported:
  • Chinese (Simplified & Traditional), Japanese, Korean, English, French, Russian, German, Dutch, Portuguese, Arabic, Persian, Brazilian Portuguese, Malaysian, Italian, Turkish, Thai, Vietnamese, Indian, Indonesian, Greek, Spanish, Czech
• OTA Upgrade: Supported
• Watch Faces: Built-in watch faces + watch face market