Realwo Fitness Activity Tracker and Pedometer Sleep Monitor Watch with 0.91inch OLED Touch Screen for iPhone IOS Android SPORTS TRACK - The smart bracelet could record your daily activities, you could check daily activities including calorie burned, walking distance and steps in the syn app "Zeroner Health". SLEEP MONITORING - The smart bracelet could automatically recognize your state and monitoring the whole sleep progress with analyzing the deep sleep and light sleep hours. CALL / SMS REMINDER / SEDENTARY REMINDER - When you have calls or SMS, the smart bracelet will vibrate to remind you, and display call ID, Show the contents of your SMS, facebook, twitter skype etc. Take a rest to avoid fatigue, the smart bracelet has sedentary reminder function to keep fit. MORE FUNCTIONS - Silent alarm by vibration, sedentary remind, looking for mobile phones and remote taking photo functions. BUILT-IN DETACHABLE USB CHARGING - It has a unique standard USB port in the host, you could remove it from the band and plug it into a USB port.