Oura Gen3 Heritage Ring Size 8 Model Brand: Oura Series: Gen3 Model: Heritage Product Name: Oura Ring Gen3 Heritage Product Type: Activity tracker Color: Silver Size: 8 Size Before you buy (Oura sizing kit available for separate purchase) Gender: Unisex Specs Operating System Compatibility: Apple iOS, Android Metrics Measured: Blood oxygen, Hours slept, Resting heart rate, Skin temperature, Steps taken Water Resistant: Yes Maximum Depth of Water Resistance: 328 feet Languages Supported: English, Finnish, French, German, Italian, Japanese, Spanish Metrics Measured: Blood oxygen, Hours slept, Resting heart rate, Skin temperature, Steps taken Number of Sensors: 15 Performance: Water Resistant Maximum Depth of Water Resistance Power: Rechargeable Charging Interface(s): Wireless Battery Type: Lithium-ion Model Number: JZ90-1003-08 Condition: Good (light wear) UPC 6430060151314