Two shipping method :DHL/Post Display type TFT-LCD Screen size 1.3" Resolution 240*240 Water Resistance Rating 5 ATM MCU GR5515, BLE 5.1, 1MB FLASH + 256KB RAM Flash 64Mb IMU STK8321...
Display type TFT-LCD Screen size 1.7" Resolution 240*280 Water Resistance Rating 5 ATM MCU Nordic nRF52840 Flash 128Mb IMU STK8321 PPG heart rate sensor PAH8009 Bluetooth BLE5.0 Battery 300mAh System...