R11-S Smart Health Fitness and Exercise Cost-Effective Waterproof Health Fitness Tracking Sleep Analysis Smart Ring. Comprehensive Health Monitoring: Tracks steps, distance, calories, heart rate, blood oxygen, and sleep patterns. IP68 Waterproof Protection: Dust and water resistant for reliable performance during sports and daily use. Customizable Ring Colors: Available in Rose Gold, Black, Silver, and other colors upon customization request. Multi-Language Support: APP supports over 30 languages including English, Chinese, Spanish, and Arabic. Long Battery Life: Up to 3-5 days of usage time with 7-10 days standby time on a single charge. Multiple Exercise Modes: Supports running, cycling, yoga, golf, hiking, and other fitness activities. Fast Sample Delivery: Sample orders delivered within 1-2 working days for quick evaluation. Customizable Appearance Material: Epoxy Resin and stainless steel materials can be customized to specific requirements.