Rechargeable Finger Counter, IPX8 Waterproof Lap Counter, Silent 6 Channel Digital Counter with LED for Prayer, Swimming, Knitting, Gift Rechargeable - The new counter has a built-in rechargeable battery, no need to replace the battery, and no mechanical defects. It can be used for 3 months on a single charge. Waterproof - With IPX8 certification rating. The shell is made of high-quality ABS with an excellent sandy texture. The silicone ring is adjustable, more comfortable to wear, and not easy to fall off. Powerful - The keys are silent and have a long service life. 6 channels can record different information, and the counting range of each channel is 0 to 999999. Supports inverted display. The full-screen LED backlight allows you to use it even at night. Wide Range of Uses - Great for any time you need to count, such as statistics, sports, scoring, knitting, crocheting. Can be used in schools, laboratories, golf, prayers, airplanes.