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Amazon.com: Haylou LS05 Smart Watch with 30 Day Battery Life, Biometric Sensors for Heart Rate Monitor, Sleep & Fitness Tracking, IPX68 Water Resistant, Metal Body w/ Touch Display, Bluetooth 5.0 : Electronics
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Xiaomi Haylou Solar: Not solar-powered, but a smartwatch that costs just ~US$20 - NotebookCheck.net News
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Amazon.com: Haylou LS05 Smart Watch with 30 Day Battery Life, Biometric Sensors for Heart Rate Monitor, Sleep & Fitness Tracking, IPX68 Water Resistant, Metal Body w/ Touch Display, Bluetooth 5.0 : Electronics
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HAYLOU Solar Lite Smart Watch 1.38" Display Bluetooth 5.3 100+ Watch Faces SpO2 Heart Rate Monitor 20 Days Endurance Smartwatch
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HAYLOU Solar Plus RT3 Smart Watch LS16 1.43"AMOLED Display Bluetooth Phone Call Smartwatch Health Monitor Waterproof Sport Watch - AliExpress
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