Amazfit Trex Pro Steel Blue Smart Watch (AMAZFIT-TREX-PRO-SB) - Resolution: 360 X 360, Display: 1.3-inch HD Amoled, Capacity: BioTracker 2 PPG Bio-Tracking Optical Sensor, 3-axis Acceleration Sensor, 3-axis Gyroscope Sensor, Geomagnetic Sensor, Ambient Light Sensor, Barometric Altimeter, Touchscreen: Tempered glass + anti-fingerprint coating, Bluetooth Frequency: Bluetooth 5.0 BLE, Water-Resistance Grade: 10 ATM, Microphone: Yes, GPS Supported, Operating system: RTOS, Colour: Steel Blue