1. 1 year warranty. Replacement or full refund without return 2. Activity Records: record daily calories, distance, quantity, count, step pedometer, activity duration; Sleep Monitor: automatic monitoring sleep duration and sleep quality, sleep can view the trend to improve sleep, and through the vibration alarm clock wake you quietly; 3. Notification Remind: intelligent notification be clear at a glance, convenient and timely access to telephone, SMS, and all kinds of social information. Through touch button began to ring view information content. Sedentary reminder, remind you to leave the seat for just the right amount of exercise; 4. Anti-lost and Remote: When the smart phone is beyond the Bluetooth range(5m), the device vibrates to remind. Operation on the screen could control remote photography shooting.