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Bluetooth Ver: 5.0
Screen Size: 1.7 inch HD screen; resolution:240X280 pixel；
Heart Rate Sensor: GR5515
Connector: Magnetic charging pad
APP name: Dafit
Compatability: Android 5.1 / iOS 9.0 and above
Battery Capacty:190mAh,standy time up to 10 days. ( up to using way, the data is only for reference)