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Lumthou Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for Lumthou products.

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Lumthou manuals

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lumthou Enamel Craft Smart Ring User Manual - Model R18

R18 • January 7, 2026

Comprehensive instruction manual for the lumthou Enamel Craft Smart Ring, Model R18. Learn about setup, health tracking, sports modes, and maintenance for your subscription-free fitness tracker.

lumthou 4G Kids Smart Watch User Manual - Model SF20250914B0F5WMZ511

SF20250914B0F5WMZ511 • December 11, 2025

Comprehensive user manual for the lumthou 4G Kids Smart Watch (Model SF20250914B0F5WMZ511), covering setup, operation, features, maintenance, and troubleshooting.