Amazfit BIP U Black Oxygenbeats Spo2 Smart Watch (AMAZFIT-BIPU-BLACK) - Resolution: 302 x 320, Display: 1.43-inch Full Color Ips Lcd, 72% Ntsc (Typical), Capacity: Biotracker 2 Ppg Biological Optical Sensor, Acceleration Sensor, Gyroscope Sensor, Geomagnetic Sensor (Amazfit Bip U Pro Only), Bluetooth Frequency: Bt5.0/Ble, Touch Screen: 2.5d Glass + Anti-Fingerprint Coating, Waterproof Rating: 25 Atm, Microphone: Yes, GPS Supported, Operating system: Rtos, Colour: Black