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1.Size: 48.5mm (Diameter)*16mm2.Screen type: E-ink 1.2'always on 3.Positioning: GPS+ Beidou+Glonass4.CPU: 2523G5.6-axim Sensor: ST-LSM6DSM6. Bluetooth: version 4.27. Strap: 24mm8. Battery capacity: 450mAh 9. Weight 87.5g10. IP68 Waterproof