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Specifications:

Diameter: 43 mm,thickness 9.8 mm(without heart rate boss)
Band Size: Width 20 mm, Expanded length 245 mm
Weight: 48g(including strap)
Material: Metal+Plastic+Liquid silica gel
Diaplay: 1.3 inch Amoled Full circle color HD screen
Battery life: 8days for daily mode,10 days for basic mode
Charging port: Magnetic charging port
Bluetooth: Bluetooth V5.0
Sensor: Optical heart rate sensor, Spo2 sensor, accelerometer
APP Support : Support Android 5.0 and above, IOS10.0 and above
(Functions vary with specific watch models, mobile phones and
countries)