Size: Width: Approximately 7.6mm, Thickness: Approximately 2.5mm Weight: Approximately 2.5g Outer Material: Titanium Inner Material: Synthetic Resin Battery: ● Rechargeable Lithium Polymer Battery ● Battery Capacity: 15mAh (SIZE12) - 20mAh (SIZE24) ● Battery Replacement: Not Possible ● Continuous Operation Time: 3 to 6 days (Varies depending on ring size and usage) ● Charging Method: Contactless NFC Wireless Charging ● Charging Time: 60 to 120 minutes (Varies depending on the battery level when charging starts) Sensors: ● Optical Heart Rate Sensor ● Red and Infrared Sensors for Oxygen Level Monitoring ● AI-equipped 3D Acceleration Sensor ● Skin Temperature Sensor ● Gyro Sensor Other: ● Communication: Bluetooth Low Energy 5.0 ● Included: Charger, Charging Cable, Instruction Manual, Setup Guide