Wearable devices control the work of a person 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 with hospital equipment about reading, this is not a medical device! - Before use, scan the QR code in the manual to download the application and connect it to the watch using the application. -For Android users: please always authorize the application access to all functions of the phone and always let it work. And please enable gps on your phone before connecting it. - Please charge it within 2-3 hours when you receive it. After a long delivery, it was turned off. Thanks! is our latest generation and most cost-effective smart watch. In this new version, 1. It has all-new 1.4" colour display and capacitive touch, supporting taps and swipes, so it is easy to read and operate. 2.Soft silicone strap makes smart watch lightweight and comfortable wear on your wrist and is available in 5 beautiful colours with matching swappable straps. 3.The APP connection product distinguishes the exercise warm-up, the burning fat, the cardio-pulmonary enhancement and the like by drawing a curve of the data obtained by the monitoring. Let you know the heart rate changes in each time period, reasonably plan the exercise ntensity, and release your sports passion more effectively. APP: Da Fit Waterproof rating: IP67 Display: 1.4 inch screen 240*240 Strap material: silicone Operating mode: full touch Battery: 170mAh battery Charging: Magnetic charging Standby duration: 10-20 days of maximum standby time, 5-7 days of normal use time Support system: For iOS 8.0 and above, Android 4.4 and above Language: Push information: Support all languages Smart watch languages: Chinese, English, Japanese, Korean, German, French, Spanish, Portuguese, Arabic, Packing List: 1× Smart watch 1× Charing Cable 1× Manual 1× Retail Box Voice assistant built-in: No Bluetooth-compatible Version: None Metrics measured: other Activity Tracked: other Category: Smart Watches Band Detachable: Yes APP Download Available: Yes Battery Detachable: No Display Size: 1.3inches Movement Type: Electronic Style: SPORT Application Age Group: ADULT Screen Shape: Round Case Material: Plastic Band Material: Adhesive Tape Waterproof Grade: Life Waterproof SIM Card Available: No Mechanism: No Multiple Dials: No GPS: No Network Mode: None Battery Capacity: 120-180mAh Rear Camera: None RAM: <128MB ROM: <128MB System: None Type: On Wrist Compatibility: All Compatible Language: English,Italian,Spanish,Norwegian,Russian,Dutch,Portuguese Function: Heart Rate Tracker,fitness tracker,Call Reminder,REMOTE CONTROL,Passometer,sleep tracker,Answer Call,Message Reminder Origin: Mainland China Certification: None