Attention: Welcome to my shop We ship the product from China, the delivery time is 7-14 days Product DescriptionThe size of the bracelet is 46.4 * 37.9 * 11.8mm1.8 inch large screen display, Bluetooth call, full screen touch, high-definition font, rotary buttonChipset GR5515+AC6963AAPP Da FitCompatible System: Android 4.4 or above, IOS 8.0 or aboveFLASH memory RAM256KB ROM64MbType TFTScreen size 1.8 inchesResolution 240RGB * 286Type Full screen touchConnection parameter BT 5.1 Low power Bluetooth chipNot supported by WIFINFC does not support4 SensorG-Sensor supportGyroscope does not supportHeart Rate Tianyi Hexin 3605GPS not supported5 BatteryBattery Type Polymer Lithium IonCapacity 260mAhCharging Method MagnetizationSports record (step counting, distance, calorie calculation), sports mode, message pushing, information storage, sleep monitoring, heart rate measurement, stopwatch, photo control, music playing, full word bank language, true blood oxygen measurement