M2 water proof Smart fitness Band compatible with Bluetooth or Heart Rate sensor.It is compatible to devices having Bluetooth version 4.0 and below in smart phones, Tablets and PC's and also support Android and IOS.It has features such as calling function which enables you make a call and disconnect it, you can also send and receive messages through it but only supported to android Phones for which you need to download app. Features: OLED Time Display 24 Formula: Check the current time.Steps: Record your steps.Mileage: Mileage of sports. SMS: Bluetooth Sync Reminders, SMS Notifications.Stand by time: 300 hours.Calories: Calories of sports.Power: Displays the current power.Heart Rate Sensor: Check your heart rate.Pedometer: Sports Pedometer, Motion Odometer.Sleep Monitor: At night, check the quality of sleep in APP.Sedentary Reminder: Remind you when you don't move from one hour. Battery Capacity: 70 mAh?Alarm Reminder.Sensor: Low-power acceleration sensor.Waterproof.Bluetooth fitness band fabricated with 0.42 inch OLED Display that fits your wrist perfectly to maintain fitness.Its total length is about 235 mm. It has an adjustable length in range of 155-210 mm and width is about 19 mm. Manufacturing Material quality: The strap material has been made up of Plastic ABS and TPS elastomer in order to safeguard you from UV radiations.Silky touch, Proven Safety and as negative results from toxicity and irritation potential. Excellent aesthetics: Outstanding resistance to Abrasion, Sweat and Sebum. with ou can use the smart watch to make or answer calls, thanks to the in-built mic; The watch's built-in speaker allows you to listen to your favorite music anywhere; Anti-lost alarm function, push notifications, remote camera; The watch has a sleep monitor, a pedometer, a sedentary reminder, water in-take reminder. A stopwatch so it helps to keep a tab on your activities.