COMPACT AND LIGHTWEIGHT: This digital hand counter measures 6.6 x 3.5 x 2 cm and weighs about 20g, compact and lightweight, you can put it in your pocket and take it anywhere, so you can start counting anytime. There is a lanyard on it, you can hang it around your neck or wrist, convenient to use and anti-lost. DURABLE QUALITY: The high-quality ABS plastic shell of this counter is durable and drop-resistant, not easy to break, with high durability. It is powered by an LR44 button battery (included) which can provide long-lasting power for more than 250 hours, can be used for a long time without changing the battery. EASY TO USE: Press the on/off button to turn the clicker on/off. When the counter is turned on, the screen will display "0". When counting, press the "+" button to add a number one by one and press the "-" button to subtract a number. If you want to reset the number to zero, you can long press the on/off button until the screen displays 0. CLEAR AND ACCURATE: This electronic manual clicker has a 4-digit LCD screen, which can display the number from 0 to 9999 (Not for negative numbers). You can count numbers from 0-9999. When you add or subtract a number, the LCD screen will display it clearly and accurately, you don't need to worry about counting the wrong number. WIDE APPLICATION: This counter has a wide range of applications and is suitable for any scene that needs to count numbers. You can use it at ports, warehouses to count goods, you can also use it to count the flow of people or cars on the street and station; or you can use it at sports matches like golf, football, swimming, running, and jump rope.