Features: This waterproof design ensures comfortable wear, while the high precise sensings deliver accurate data and long lastings battery lifes supports all day use. For individuals who frequently need to count, such as religious practitioners, meditators, ritualists, students, fitness enthusiasts, and professional requiring precise timing and counting. Perfect for religious ceremonies, daily prayer, rituals, kitchen cooking, sports training, study timing, laboratory research, and everyday life management. Seamlessly connect to your smartphone by wireless to track prayer counts through the dedicated app, making it a essential accessory for both spiritual and practical pursuits. Support mobile App connection, and the charging box stores electricity, which is convenient and efficient. Specifications: Component:Metal Size:Approx.18mm/20mm/22mm Color:Black/Blue/Gold/Green Package Includes: 1 Set Intelligent Finger Counter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.