Warm Remind 1. APP Support System: Android 4.4 and above, IOS above 9.0 2. Do not use a charger higher than 5V/2A. 3. The data cannot be used as medical reference. 4. The watch can\\\\\\\'t touch the hot water because the hot water would cause the watch display get fog. USB Quick Removal Direct Charge Brand new bracelet charging method, quick-release detachable wristband design, can be charged by plugging in the USB interface, eliminating the trouble of carrying a charging cable and charging stand. Smart Life Assistant The watch can monitor the steps, calories, heart rate, distance, sleep quality, etc. Of the day. At the same time, it can connected to a phone to view information, remotely take pictures, retrieve mobile phones and other thoughtful and convenient functions to make your life more convenient. Practical Keep abreast of your exercise intensity and physical condition in order to adjust your fitness plan in a timely manner. Skin-friendly material The bracelet wristband is made of lightweight skin-friendly soft TPU, which adopts lightweight design, no feeling to wear. Main Features * Model Number: D20  Smart Watch * APP: FitPro * Bluetooth Version: Bluetooth 4.0 * Waterproof / Water-Resistant: Yes(Not for swimming ) * Operating mode: Touch button * Power on: press and hold the function key * Screen Type: 1.3inch TFT LCD * Storage(FLASH)16MB+128KB * Compatible OS: Android,IOS * Standby time: 4-7days normally use; 30 days standbybased on 230mAh * Functions: Sport,Message,Alarm Clock,Blood Oxygen,Date,Measurement of heart rate,Sedentary reminder,Sleep management,Time * Notification type: Facebook,Twitter,Wechat,WhatsApp * Alert type: Vibration APP Language Support English,French,Italian,Japanese,Korean,Polish,Portuguese,Russian,Simplified Chinese,Spanish,Traditional Chinese,ect Package Contents 1 x Watch,1 x Manual,1 x Box Tips for use 1. This product can only seurface splash waterproof(Cool water),please don\\\\\\\'t wear it to swim,drop it to the water or soaked in water ect. 2. When you first receive the product, charge it for 5-10 minutes at first if it cannot be turned on because it is already low on power. 3. Please contact us if the product has quality problems, we will reissue for you

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