Features: Experience seamlessly counting with the C2 Digital Counting Tool, innovative device to accurately track up to 9999 counts effortlessly. This Digital counter features a sensitive input 3.7V and a waterproof rating of IP67, ensuring reliability in various environment. For prayer practitioners, the C2 Digital Counting Tool serves as a discreeted and convenient tool to count prayer and maintain focused on spiritual practices. Whether you're engaging in daily prayer or counter for other repetitive tasks, this intelligent accessory is enough to suit all your counting needs. Elevates your counting experience with this wearable technology that combines functionality , making it a must addition to your Digital wearables collection. Specifications: Input : 3.7v Waterproof Rating: IP67 Component：ABS Item Size:about 3.13x2.11cm/1.23x0.83in Number ranges：to 9999 Optional Size : 18 22mm/20 22mm Package Includes: 1PC Digital Counting Tool note: Due to the problem of lighting effects there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.