Main screen size: 1.3 inchesTouch: simple touchMain screen resolution: 240 * 240Bracelet size: 42.6 * 37.3 * 11.8Hardware parameter platform: nRF52832CPU and FLASH: 512KB FLASH + 64KB RAM, external 64MB FLASH extensionBluetooth: Support BLE4.0Acceleration sensor: Roma KXTJ3-1057Photoelectric detection: PD70 (Taiyiguang)Battery type: built-in batteryBattery capacity: 300 mAhCharging: magnetic chargingWaterproof: IP67 waterproof (do not put it in hot water or drive.)The main function:Heart rate, monitoring blood pressure; sports data collection; steps; sleep monitoring; sedentary booster; callback, alarm clock, information notification and other functions.Customize with the client application to synchronize motion data.