Features: This intelligent rings is equipped with an electronic counter that can easily record the number of times you chant or meditate, helping you focus on your practice. Support the replacement of rings designs to meet the needs of different occasions, allowing technology and buddhist mood to blend perfectly. The APP is intelligently interconnected, allowing you to view real-time counting data, set goal, and track daily practice progress. Simple and easy to use, allowing you to know your meditation rhythm at any time. IP67 Waterproof and durability design, not afraid of rain or sweat, suitable for daily wear, sports or outdoor activities. Equipped with five interchangeable finger rings, suitable for different finger sizes to meet different needs. Multi functional, not only as a tool for practice, but also for fitness counting, task reminders, or time management. Specifications: Component: ABS Color: refer pictures to selection please Size: 16.5mm/0.64inch, 18mm/0.7inch, 20mm/0.78inch, 22m/0.86inch, 23.9mm/0.94inch(5 size replaceable) Package Includes: 1 Set Intelligent Rings Digital Counter(5 size replaceable) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.