Efanr IP68 Waterproof Bluetooth Wrist Smart Watch with Heart Rate Monitor Professional Swimming Fitness Pedometer Tracker Healthy Sport Smartwatch Bracelet Mobile Phone Mate for IOS Android Professional IP68 waterproof: F69 smart watch can be weared to swim. Up to 6-7 days using time without charging when heart rate mode and bluetooth closed. Always can see the time: The screen is always light on, you can get time easily without doing anything; No afraid of sunlight, it shows better display effect under the sunlight. Identify four kinds of swimming modes: freestyle, breaststroke, backstroke, butterfly; 2 kinds of heart rate tracker: Healthy heart rate mode and sport heart rate mode, test your heart rate in different situation, more professional and more accurate. Information push: Can push Twitter, Facebook, Wechat information, you can easily communicate with your friends. Pedometer / Sleep monitoring / Sedentary reminder: Your private management expert; Call / SMS reminder: When calls or messages come, it will remind you with vibration. Support android 4.3 and IOS 8 or above system phones. Note: iPhone do not support Message Reminder or information push function.