Smartband K18 Waterproof 0.66" Heart Rate Monitor Sport Bracelet Fitness Tracker Smart Reminder 23 oz Note: The 4K

23 oz Note: The 4K resolution is interpolated

The 3 positioning holes on the strap allows for different size of tube

operate the mobile function and share the data by NFC wireless frequency communication technology

DDNS Supported Phone Systems: android system

1 x S9 Smart Bracelet

Smartband K18 Waterproof 0.66" Heart Rate Monitor Sport Bracelet Fitness Tracker Smart Reminder 23 oz Note: The 4KProduct Features: Perfect Smartphone Companion 24 Hour Real Time Heart Rate Monitoring It is the basic function of heart rate monitoring device, to monitor data for 24 hours everyday. You can make a clear understanding of your own heart rate and check your health situation anytime & anywhere. IP68 Waterproof Performance Compared with other smart bracelet, its IP68 waterproof rating can completely resist raining, showering. Even we don't have to take