1、1.BT call:After connecting the mobile phone and the watch app, you can directly use the watch to make a BT call or dial. 2、2.Custom Dynamic Watch Face:After connecting the mobile phone and the watch app, the app has built-in 100+ dials and several dynamic dials, and the images on the mobile phone can be set as the default watch screen. 3、3.More functions:breathing training,dial push,Stopwatch,brightness,adjustment,sports multi-mode,sleep monitoring,heart rate monitoring,reminder information,remote music,remote photo,time,mobile phone search (mobile phone use),BT call,BT music playback,password conservation,calculator,split ,screen view,quick widget,female assistant. Title： DT100 Plus BT CallingSmartWatchCustomDialSleepHeartRateBloodOxygenMonitoringIP68 Waterproof SmartSportsWatch Features： BT call:After connecting the mobile phone and the watch app, you can directly use the watch to make aBT call or dial. Custom Dynamic Watch Face:After connecting the mobile phone and the watch app, the app has built-in 100+ dials and several dynamic dials, and the images on the mobile phone can be set as the default watch screen. More functions:breathing training,dial push,Stopwatch,brightness,adjustment,sports multi-mode,sleep monitoring,heart rate monitoring,reminder information,remote music,remote photo,time,mobile phone search (mobile phone use),BT call,BT music playback,password conservation,calculator,split ,screen view,quick widget,female assistant. Reminder message:Support message notification from communication software such as SMS,Line,Whatsapp,Skype,Instagram,Kakao talk, etc. IP68 waterproof, atmospheric pressure, ultraviolet rays.It supports air pressure and ultraviolet measurement,allowing you to take precautions in advance IP68 waterproof and dustproof, when washing hands,rainy days, the watch can also be used normally. Specification： Screen size: 1.75 inches Screen resolution: 320*385 Screen type: LTPS LCD screen Screen material: Tempered Wristband Material: Silicone Battery type: Lithium battery Battery voltage: 3.7V Battery capacity: 280mAh Battery life: 3 days for normal connection and 5 days for standby. (Connection use depends on personal usage) Charging method: Magnetic charging Charging time: About 2 hours Waterproof level: IP68 Product process: Zinc alloy/PC plastic App: Wearpro Chip: Realtek 8762DK Heart rate sensor: Zhanheng BD1662 Andiord system:Support Android 4.4 and above IOS system: switch IOS8.0 or above BT:BT 4.0+BT Audio 3.0 Package list: 1*Smart watch 1*Charging cable 1*Smartwatch1*Charging cable