Specifications:watch Dimensions:L*W*H=44*38*10.5mmwatch Weight:49ggift box size:15.8*9*2.1cm49+73 =122gScreen Size:1.83"IPS HD 240*285 FULL touchColor ScreenBattey: 3.7V/280mAh Lithium-ion polymer batteryCPU: Smart watch Chipset: AC6956AHeart rate and blood pressure chipset: 3605G-SENSOR: SILAN SC7A20Call bluetooth: AB5376A2RAM: 128MSpeaker: Built-in 8MM 8/0.7W speaker x 1MIC: Built-inG-senso: Built-inBluetooth: Built-in-BT 5.2Data transfer supportive: via app(DAFIT)Charging Method: Micro USB Turn suction chargeCharging time: About 1.5HDuration time: Talk for 3 hours/ Normal use for 7 days/ standby for 15 daysCalories: SupportCamera Remote-Control: SupportBT Call: SupportBT Music Player : SupportTime Sync.: SupportCall History: Support answer and recall last oneAnti-lost: SupportRedial: SupportSleep monitor: SupportSteps: SupportHeart rate: SupportBluetooth Headset: SupportBlood pressure: SupportAlarm: SupportMultimotion sports mode: SupportWaterproof: IP 67 life waterproofSystem Requirements: android5.0+ / ios10.0+Soft Language: Default China and EnglishMulti language supportFirmware language: Chinese, English, Arabic, French, German, Spanish, Portuguese, Russian, Korean,Thai, Polish, Italian, Japanese, Traditional, Czech, Turkish, Greek, Latin, UkrainianSmart Phone Information notifcation: Gmail, CNN APP, ZAKER,LINE, Facebook, Instugrate,Facebook Message,QQ,V Message, wechat,360APP: DAFIT