Product name:finger counterProduct size about : 2.7*3.5cm/1.06*1.37inchProduct color: As shown in the figureProduct material:abs +plasticproduct features:1. LED DISPLAY: The nighttime LED display provides clear, easy-to-read numbers, perfect for counting times and steps in low-light environments. The finger calculator is compact and lightweight, easy to carry and store, and can be worn at any time.2. The interface of this finger calculator is simple, intuitive and easy to use. You can check the quantity quickly and accurately.3. Equipped with a high precision sensor. You can use the finger ring calculator without worrying about the calculation.4. Battery powered. You can replace the batteries at any time without worrying about running out of power.5. Made of high quality material, durable and reliable, you can count your finger rings 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