Dear Customer.Thank you for your support and choose. If our products have any problems, there is no need to make a claim, please contact us through the order message. Due to time difference, we may not be able to reply you immediately, but we will definitely help you with a satisfactory solution within 24 hours and solve any problem for you.Note:1. After receiving the watch, please charge the watch in the correct magnetic direction for 2-3 hours (do not use fast charging, it is recommended to use a 5V1A charging head), then press and hold the side control button for 5 seconds to turn on the watch2. The product is waterproof, but please do not touch the water for a long time and do not charge the battery when there is water.3. This product is an electronic test product, the data is for reference only, not for medical purposes.4. For Android users: Always authorize the app to access all phone features and always let it work. Please turn on the GPS of your phone before connecting.Connect app:The watch must be linked to the app to enable all functions.Scan the QR code on the manual to download the DaFit app, open the app, switch to the device interface, click to connect the device, select ZL02D in the scan list, the addition is successfulPackage List:1 x watch Smart1 x Charging Cable1 x Instruction ManualFeature:The watch is available in 3 colors, beautiful and fashionable, suitable for business, sports and leisure. It is a good combination of use. Watches are a good choice for gifts to family and friends. Smart watches are versatile and easy to operate. The watch can be used alone or connected to a mobile phone app at the same time.IP67 dustproofIt only supports hand washing and use when it rains to meet daily needs. Not recommended for swimming. Note: Not suitable for use in hot baths or saunas.Variety of functionsHeart rate monitoring, blood pressure, time display, date, steps, distance, calories, sleep monitoring, call reminder, social app message reminder, sedentary reminder, app side message reminder, enable switch ( incoming call, SMS, WeChat, qq, facebook , Twitter, linkedin, whatsapp, line, instagram, snapchat, skype and other mobile applications) and event information reminders, such as sedentary, alarm clock, drink, medicine, etc., take pictures remotely, raise your wrist to light up the screen, change the wallpaper, stopwatch, find the phoneHealth monitoringTake control of your health. It has a 24-hour heart rate monitoring function, which can be detected manually or automatically (continuous heart rate switch is turned on on the APP side). It can also detect blood pressure, blood oxygen saturation and sleep status.Multi- sport modeSupports monitoring of multiple sports modes, such as running and cycling. You can use the watch to record your exercise status at any time. You can record your exercise time, distance, calories burned, etc., and it will become your closest partner in exercise.event reminderThe watch has a sedentary reminder function. When you are busy with work and forget the time, it will gently vibrate to remind you to relax. You can also set alarms, drinking water and other event information reminders.Information SynchronizationThe watch connects to the APP downloaded on the mobile phone via Bluetooth, and can synchronize the language, sleep history, weather information, send and remind information.Specification:Screen: 1.28 inch 240*240px full touch screenOperation mode: full touch and side buttonsBluetooth version: Bluetooth 4.0 or aboveBattery: 220mahCharging method: magnetic line chargingWaterproof rating: IP67 waterproofStrap material: siliconeCompatible platforms: Android 5.0 and above and IOS 9.0 and aboveSupport languages: English, Spanish, Simplified Chinese, French, German, Italian, Russian, Portuguese (support in multiple languages for message content push)Waterproof: The watch is IP67 waterproof, it can be worn when washing hands, but cant be in hot water environment and cant stay in the water for a long time.If the watch has water problem accidentally, please keep it in a dry environment for 1-2 days, and then use it after drying.Phone: The watch can only reject calls, but cant answer and make calls.Messages: You can see the messages on this watch, but you cant reply to them.Music: The watch can control play, pause, previous, next, and volume of phone music.Weather: Requires you to allow the DaFit app to read weather information from your phone. In More settings >>> Weather information >>> City. Activate the weather information button and select your city. Also, keep DaFit running in the background on your phone so the watch doesnt go offline too often.Wallpaper: In DaFit App>>>Device>>>Dial Selection>>>Edit, upload the photo you want. After the image is uploaded successfully,Vibration reminder: when you receive a message or event reminder, the watch will vibrate, but if the power saving mode is activated (blue is on, gray is off), the vibration reminder will turn off.What happens if messages from WhatsApp or other applications do not appear?The watch can only display the last 5 messages that have arrived on the phone screen.(1) DaFit APP device page >>> news push >>> more news push, blue is open, please allow DaFit message permission in the mobile phone notification settings;(2) Check the settings on WhatsApp or other messaging platforms to allow new messages to appear on the phone screen;(3) Please keep the DaFit app running in the background on the mobile phone, and make sure the distance between the watch and the mobile phone is within the Bluetooth range (within 10 meters) to avoid disconnection.Occasional dropped calls are also normal as the signal is occasionally delayed. This is a common problem with smart devices. This shouldnt affect usage, they reconnect automatically.