COMPACT AND LIGHTWEIGHT: This digital hand tally counter measures 6.6 x 3.5 x 2cm and weighs about 20g, making it compact and lightweight. It can be easily carried in your pocket for convenient use anytime, anywhere. A lanyard is included, allowing you to hang it around your neck or wrist for added convenience and security. DURABLE QUALITY: Constructed with a high-quality ABS plastic outer shell, this counter is wear-resistant and impact-resistant, ensuring long-term durability. It is powered by an included LR44 button battery that provides reliable operation for over 250 hours, minimizing the need for frequent battery replacements. EASY TO OPERATE: Press the on/off button to power the device. When turned on, the screen displays "0". To count, press the "+" button to increment the count and the "-" button to decrement. To reset the count to zero, press and hold the on/off button until the display shows "0". CLEAR AND ACCURATE: Features a 4-digit LCD display that shows counts from 0 to 9999 (does not support negative numbers). Each press of the button updates the count clearly and accurately on the screen, helping prevent counting errors. WIDE APPLICATION: Suitable for various environments where counting is required. Ideal for use in warehouses and docks for inventory tracking, at streets or stations for monitoring foot or vehicle traffic, and during sports activities such as golf, football, swimming, running, and jump rope.