Specification Brand Bakeey Model M4 Pro Color Black,Red, Blue Bluetooth Version BT 4.0 or above Compatible OS Android 4.4 or above iOS 8.0 or above Operating Mode Single Touch APP Name Fitpro App Language Russian, Turkish, German, Czech, Slovak, Japanese, French, Polish, Thai, Simplified Chinese, Traditional Chinese, English, Dutch, Portuguese, Spanish, Arabic, Malay Special Features Waterproof IP67 Heart Rate Monitor Support Blood Pressure Monitor Support Sleep Monitor Support Multi-sport Modes Support Pedometer Support Call orMessage Reminder Support Reject Call Support Notification Support Facebook,Twitter,Wechat, WhatsApp etc. Alert Type Vibration Auto Light-up Screen Support Stopwatch Support Other Functions Support Alarm,Calender,Sedentary reminder,Camera remote control,Anti-lost, Technical Parameters Sensor G-sensor, Heart Rate Sensor Screen Size: 0.96inch Type: TFT Resolution: 80*160pixels Battery Battery Capacity: 90mAh Standby Time: About 15 days Using time: About 5-7 days Charging Time: About 2 hours Charging Type: USB direct charging dont need charger Appearance & Details Band Material: Silicone Length: /mm Width: /mm Weight and Size Product size: /mm Product weight: 38g 1*Bakeey M4 Pro Smart Watch 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 life waterproof. Not for swimming, showering and diving. 2. Q. What is the APP? A. It's FitPro. 3. Q. How to change the time of my device? A. Please synchronize the device with your phone through Bluetooth to calibrate time.