This fourth generation smart watch features a 1.91 inch HD display, voice calling, one-button connection, 24-hour heart rate monitoring, nighttime blood oxygen saturation, 24-hour blood sugar monitoring, 24-hour blood pressure monitoring, sleep tracking, and over 50 sports modes with fitness tracking. It also supports the Tuya app, allowing for all smart devices to be controlled in one place.

1.91-Inch HD Screen
Voice Call, One Button Connection
24-Hour Heart Rate Monitoring
Nightly Oximetry
24-Hour Blood Glucose Monitoring 
24-Hour Blood Pressure Monitoring
Sleep Monitoring
More Than 50 Exercise Patterns + Exercise Monitoring

APP: H Band
Master chip: JL7013A+ 64M FLASH
Gsencor sensor: KTJ3-1057
APP supports: 19 countries: English Chinese Simplified Chinese Traditional Korean German Russian
languages: Spanish Italian French Vietnamese Portuguese Persian Polish Turkish Czech Slovakia
Watch support: Dial language: English, Chinese, Japanese 9 countries: (support 150 countries to
language: customize) Simplified Chinese, Japanese, English, German, French, Portuguese,
Watch push: Chinese, Japanese, Korean, Latin, Cyrillic; Latin includes: (English, French, Spanish,
language: Portuguese, German, Dutch, Vietnamese, Northern Europe, Central Europe,
size: 1.91 "square screen resolution: 286 * 340 (sRGB high color gamut)
type: IPS LCD
Bluetooth: Bluetooth 5.3
weight: Head: 33.2g Complete machine: 51.5g
colour: Vermilion color, gold
other: Operation: full touch
Battery: Polymer lithium ion battery
Battery capacity: 3.7V /200 mAh
Charging mode: Magnetic suction charging wire
Charging time: About 2 hours

Packaging:

• 1× Smart Watch F57 Entity
  
• 1× User Manual
  
• 1× Charging Cable
  
• 1× Watch Strap
• 1 x Packaging box