Advanced features include Bluetooth calling that allows users to answer calls by raising their hand and tapping.
Redmi Watch 4 Specifications
1.97-inch (390 x 450 pixels) AMOLED screen, up to 600 nits brightness Sensors: Acceleration sensor, Gyro sensor, Optical heart rate and blood oxygen sensor, Ambient light sensor, Geomagnetic sensor 150+ sports modes, voice coach available Daily activity tracking, Heart rate sensor (with blood oxygen sensor), Accelerometer, Gyroscope, Ambient light sensor, electronic compass 5ATM water-resistant Speaker for Bluetooth calling Dimensions: 47.5×41.1x 10.5mm; Weight: 31.5g (without inbox strap) GPS | Galileo | Glonass | Beidou | QZSS), Bluetooth 5.3 470mAh battery, Up to 20 days with typical mode, Up to 10 days with AOD mode, and up to 30 days with long battery life mode.