Rechargeable - This new counter features a built-in rechargeable battery, eliminating the need for battery replacements and mechanical failures. Enjoy up to 3 months of use on a single charge. Waterproof - With IPX8 certification, this counter is built to last. The shell is made of high-quality ABS with a premium sand texture. The adjustable silicone ring ensures a comfortable fit and prevents it from falling off. Powerful - The buttons are quiet, durable, and long-lasting. Six channels allow you to record different information, with a counting range of 0 ~ 999999 for each channel. Features inverted display support. The full-screen LED backlight allows for easy use even at night. Wide Range of Uses - Perfect for any occasion where you need to count, such as statistics, sports, scorekeeping, knitting, and crocheting. Ideal for use in schools, laboratories, golf, casinos, bars, prayer, airplanes, and games.