Smart Watch, Multifunctional R9 Bracelet Charge Fitness Wristband Silicone Replacement Waterproof Sports Bluetooth Bracelet (Gold Black) Message Reminder: When your phone receives calls, messages or other notifications such as from Facebook, Twitter, Snapchat, Whatsapp and Wechat, R9 Smart Bracelet will vibrate to remind you. Simply lift your arm to view the notification icon on the display screen which even shows caller name/ID when you receive a call. Physical Health Steward: R9 Smart band can comprehensive analysis of sleep time, sleep depth, awake sleep etc, help to guide and improve your sleep quality. And there are effective calorie burned analysis built for you. Sports Management: Tracks your performance in fitness sports like riding, running, and badminton and delivers in-depth reporting right to your smartphone, and sync its data via Bluetooth 4.0 to the Mi Fit app, so you can check daily, weekly, and monthly history to make a scientific workout program for a healthier lifestyle. Long-time Working: Polymer lithium battery, its capacity is 90 mA, so it can work on long time. USB quick charge. Charging for 60 minute, working for 5-7 days and standby by about 20 days. Waterproof: R9 Smart band is durable and resistant against water splashes, sweat, cosmetics, dust and more. It can play a protective role for soaking and also can be worn when washing hands or showering and swimming. And you don't have to worry that it will be damaged when it rain suddenly on outdoor.