-- Android system 4.4 version or above ;IOS system 8.0 version or above ;Support bluetooth with 5.0 version;; -- BLE 5.0; -- Realtek8762DK; -- Flash128MB; -- 400mAh; -- standby about 30days. Specifications: -- 1.39 inch IPS screen; -- Multiple watch faces pushing,Customized watch faces; -- Bluetooth calling/BT music(Superior clear audio like sound effect),Weather; -- Heart rate detection/Blood pressure detection/Blood oxygen detection/Wole-day heart rate monitor; -- Timer ,Pedometer,Calorie Consumption,Distance Calculation,Heart rate,Blood pressure,Blood oxygen,Sleep time /quality,On & Off dispaly，Multiple sport modes; -- Sleep detection (Sleep time ,Sleep quality); -- Calls to remind,SMS Reminder,Third-party messaging reminder Multilingual push,Clock alarm,Remote Camera，Sedentary reminder; -- 400mAh big battery,super long standby time. Language English,Chinese,Japanese,German,French,Spanish,Arabic,Russian,Ukrainian,Russian,Portuguese Package Included: 1* smart watch 1* charging cable 1* user manual