[Easy to Use] --- The button on the top of the counter is used to turn the counter on or off. Use the plus button and minus button to count up to 0-9999, easy to use. [Replaceable Battery] --- The battery cover is removable, and the battery power source is an AG13 button battery. When the battery is dead, you can buy a battery that suits your needs and is easy to replace. [Utility] --- You can get 2 portable digital counters. Compared with traditional counters, electronic digital counters are light in weight, easy to carry, low in power consumption, and work more stable. [Humanized Design] --- The counter has voice prompts and will make a sound when counting. If you don't like the sound, please press and hold the +/- button for 5 seconds to turn off the sound. Counter with lanyard Available in black, you can wear it around your neck or hang it on your backpack for easy portability. WIDE APPLICATIONS---Electronic digital counters can be used in many public places such as schools,