User Manual: http://myosuploads3.banggood.com/products/20190901/20190901224039S10usermanual.pdf Specification Brand Bakeey Model S10 Color Black,Blue,Red Bluetooth Version BT 4.0 or above Compatible OS Android 4.4 or above iOS 7.1 or above Operating Mode Round Touch Screen APP Name Wellgo App Language Ukrainian,Russian,German,Japanese,French,Simplified Chinese,Traditional Chinese,English, Portuguese,Spanish Special Features Waterproof IP67 Heart Rate Monitor Support Blood Pressure Monitor Support Blood Oxygen Monitor Support Sleep Monitor Support Multi-sport Modes Support (Jogging/Running/Biking etc) Call or Message Reminder Support Reject Call Support Weather Display Support Notification Support Facebook,Twitter,Wechat, WhatsApp etc. Alert Type Vibration Auto Light-up Screen / Stopwatch Support Other Functions Support Pedometer,Alarm,Calender,Sedentary reminder,Camera remote control,Anti-lost, Technical Parameters Sensor G-sensor, Heart Rate Sensor Screen Size:1.3 Inch Type: IPS Resolution: 240*240pixels Battery Battery Capacity: 420mAh Standby Time: About 30days Using time: About 10days Charging Time: About 3.5hours Charging Type: Magnetic charging Appearance & Details Band Material: Silicone Length: about 205mm Width: about 22mm 1*Bakeey S10 Smart Bracelet 1*Charging Cable 1*User Manual (English Version) Tips: 1.Display and light of shoot will affect the color of the products, pictures for reference only, subject to our available products. 2.Please download the app before usage in order to compatible perfectly with your phone. Q&A 1.Q. Is it waterproof ? A. It's IP67 waterproof. 2. Q. What is the APP? A. It's Wellgo. 3. Q. How to change the time of my device? A. Please synchronize the device with your phone through Bluetooth to calibrate time.