Fitstep Heart Rate Monitor Waterproof Bluetooth Smart Fitness Tracker Wristband, Silicone Wristband, Calorie and Step Counter, Call Notification for Android iOS IP67 waterproof and Dustproof: not only can prevent dust, or even wear it in the shower or swim. High battery capacity: charge for 1 hour, you can use 7 days, charge for 2 hours, use 15 days. sleep monitor: strive to get a better sleep by recording your daily Sleep time and sleep quality. Plus use the alarm clock to make sure you're never Late to your next important appointment! sedentary: let this monitor help you stay active with the special sedentary reminder feature. Set your desired time and fit idea will remind you to stand up and be active! sedentary: let this monitor help you stay active with the special sedentary reminder feature.