Product name:Finger Counter(Random color) Product Size about:2.7*3.5cm/1.06*1.37in Product color: As shown in the figure Battery: RC2032(260mah) Product Material:ABS product features: 1. The finger calculator is small and lightweight, easy to carry and store, and can be worn at any time. 2. 2. The interface of the finger calculator is simple, intuitive and easy to use. You can use it to record your exercise, it has a wide range of uses you can imagine. 3. Equipped with high precision sensor. You can rest assured that you can use the finger ring calculator to make calculations. 4. Battery powered. You can replace the battery at any time without worrying about running out of power. 5. Made of high quality material, durable and reliable, you can count the finger ring with confidence. Equipped with a strap, you can easily wear it on your thumb for operation and observation. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc Finger Counter(Random color) Compact and Portable Design: finger calculator is designed to be small and lightweight, allowing you to easily carry with you wherever you go. can be conveniently stored in your pocket or bag for quick access. Easy to Use - you just need to press button on hand counters clicker, and there is a reset knob on side, which can be reset only by rotating clockwise a few times; Please note that this counter cannot subtract numbers Digital - This counter has a simple and intuitive interface and is easy to use. You can check quantity quickly and accurately.