This is a specially designed keychain with calculator. This key chain is made of good material and lasts a long time. It can be a keychain for everyday use or a calculator for study or work use. And it's easy to remove or hung on your bags. Features -Color: Random Color -Material: Plastic. -Size: About 5.50X3.80X0.80cm/2.16X1.49X0.31inch. -Manufactured with materials, practical and durable for a long term use. -It can be hung not only on the keychain, but also on the backpack, which is convenient for you to calculate anytime, anywhere. -Unique and adorable , chic and creative, it is also a very good key or backpack pendant. -The workmanship of this product is perfect, and you will have a good experience in using it. -The keychain design makes it easy to hanging up, fast and simple, and especially practical. Package list: 4 x keychain calculators