Rechargeable - The new counter has a built-in rechargeable battery, no need to replace the battery, 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 ~ 999999. Support 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, casinos, bars, prayers, airplanes, gambling.