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B57 Fitness Tracker Smartwatch: A Good Under $20 Alternative to Amazfit GTS with Multiple Watch Faces!

√ 1.3-inch IPS color screen
√ Heart rate & blood pressure monitoring
√ Information reminder
√ Power saving mode
√ 25 days ultra-long battery life
√ 7 sports modes
√ IP67 waterproof View More View Less

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