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D20 Pro/Y68 Pro 1.44 inch Smart Watch Bluetooth Fitness Bracelet For Android ios Note: Wearable devices monitor a person's work through electronic sensors, and they are at the level of consumer electronics. This is normal for a certain deviation. The user must objectively process the data. -Please do not compare yourself with equipment on reading, this is not a device! -Before using, scan the qr code in the manual to download the app and connect it to the watch using the app. -For android users: please always authorize the application's access to all functions of the phone and always let it work. And please activate gps on your phone before connecting it. -Please charge within 2-3 hours when you receive it. After a long delivery, it was disconnected. Thank you very much! Product functions: Heart rate, blood pressure, blood oxygen, distance, calories, sedentary, alarm, clock, sleep monitoring, find phone, find watch, gesture gesture Vibration message notification: qq fa-cebook whatsapp tw-itter skype instagram wechat Application language: Chinese, English, Spanish, French, Dutch, Portuguese, German, Russian, Turkish, Japanese, Persian, Arabic, Malaysia, Thai. Description: Material: Silicone Battery capacity: 150mah battery capacity Body memory: 258mb How to wear: bracelet Operation mode: to-uch Interface: USB 3.0 Wireless distance: 5m (inclusive) -10m (inclusive) Communication function: not supported Wrist strap material: silicone Applicable to: General Phone version compatibility: ios8.0 and android 4.4 superior BT version: 4.0 Display: 1.44 "color screen Size: 43.5 * 36 * 12.3mm Screen: 240 * 240 resolution Standby time: 10 days or more Working hours: 5-7 days Charging port: USB charging port Water level: IP67 Button: One To-uch Color: black, pink, silver black The package includes: 1*Smart watch 1*USB charging cable