Silver Fitness Smart Ring with Temperature and Heart Rate Sensors

Dimensions: Width7.7mm,thickness2.2mm 
Material: 24K gold, platinum, silver titanium or inlaid gemstone
Heart rate and blood oxygen sensor 
Motion sensor 
Temperature sensor 
Battery: Lithium polymer 
Operating temperature: -10~50°C
Charging method: Magnetic charging / Charging case (optional) 
System compatibility: Android 8.0 and 
above, iOS 10.0 and above 
Water Proof level: IP68