titanium steel intelligent process temperature sensing changing monitoring control temperature change heart beat rings
Regular price
$0.78 USD
Regular price
Sale price
$0.78 USD
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per
heart beat ring
titanium steel material
color change as temperature change
sizes: 6 7 8 9 10 11 are available
titanium steel material
color change as temperature change
sizes: 6 7 8 9 10 11 are available