Features: The SY01 intelligent rings is intelligent wearable device that combines fashion and technology, equipped with advanced touch display screen to meet modern people's needs for health management and exercise monitoring with convenient operation and rich functions. Equipped with heart rate monitoring and sleep tracking functions, it can record your heart rate changes in real time and analyze sleep quality. By connecting to mobile applications, you can easily view historical data and understand your physical condition. Supports multiple exercise modes, including running, swimming, cycling, helping you achieve a more scientific exercise plan. touchable screen design provides intuitived user interfaces and simple and convenient operation. Adopting a lightweight design, the SY01 intelligent rings not only with stylish appearance, but also ensures comfortable wearing. Whether for daily work or sports occasions, it can perfectly fit your fingers, bringing you comfortable wearing experience. Great gift, whether on birthdays, holidays, or special anniversaries, this intelligent rings will become a practical and meaningful gift! Specifications: Product name: SY01 intelligent rings Material: ABS Color: Black Size: 10, 11, 12, 13(optional) 10: Inner diameter 19.9mm/0.78inch 11: Inner diameter 20.7mm/0.81inch 12: Inner diameter 21.5mm/0.84inch 13: Inner diameter 22.3mm/0.87inch Waterproof: IP68+5ATM Package Includes: 1 Piece Intelligent Rings(1pc, not multiple) 1 Piece Charging Box 1 Piece Data Cord 1 Piece User Manual note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.