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GStorm Smart Watches compatible IOS 9.0 and above, Android 5.0 and above,it is a Sport Fitness Tracker,contain Multiple Sports Modes,Equipped Motion Sensor can Intelligently Calculate the Motion and Walking Distance, Effectively and Scientifically Guide the Exercise, so as to Maximize the Motion Effect.Built in Voice Broadcast Function, which can Realize Key Number and Call Number; At the Same Time, the Intelligent Voice can be Started in the Control Center, and Voice Calls can be made and Answered.Sleep MonitoringMonitor your Sleep Data, Achieve your Sleep Goals Every Night, and Live a Healthy Life Every Day.Bluetooth CallsAfter Successful connection with App and Bluetooth, You can Make and Receive Calls on the Watch and Synchronize the Frequently Used Contacts in the Phone Book.Heart Rate\/Blood Pressure MeasurementThe Optical Heart Rate Sensor is Used to Obtain Accurate Heart Rate and Blood Pressure Data Through Precise Calculation Through Visual Light Band Measurement Technology. (For Reference Only, Non Medical Devices)Mode Rich DialAfter the Bracelet is Connected to the App, you can also Download Various Exquisite Dials from the App to Refresh Every Day; It can also Convert the Scenery Taken in the Mobile Phone and the Favorite Beautiful Pictures Collected Into the Dial Background to Meet the Diversified Needs of Users.Send\/Receive SMSKeep the Watch Connected to the App. When There is a Message from the Mobile Phone or Social App, the Watch will Vibrate and Remind You not to Miss any Important Information. Product Information:Motherboard Size:26.8*13.4*0.8mmBT:5.0+5.0 Dual-ModeLCD:1.83(240*283)Heart Rate Sensor:YesTemperature Sensor:NoCharging Mode:2pin Thimble Charging compatible with Shrapnel ChargingPower Amplifier:YESBattery Capacity:160mahCharging Time:About 2HDuration Time:About 7-8HWork Time:24-36HAPP System:IOS 9.0 and above, Android 5.0 and aboveSocial APP Message Reminder:WeChatQQFacebookTwitterLineWhatsappInstagramFunction:StepsDistance CalculateCalories,Heart Rate Monitoring,Blood Pressure MonitorAPPBlood Oxygen Monitor,Sleep Monitor,Bluetooth CallMessageSocial APPInformation Reminder,Alarm,Sedentary Remind,Multi-Exercise Raise Hand Mode,Bright Screen,Remote Capture,Bluetooth Music,Weather,Clock Dial,Language,Time Setting,Date Setting,Voice Announcements,Two Way Rotation of Bezel,Modulation.