Features: Fast Calculation: This calculator is a must-have for home school or office and it plays an important role in helping you calculate numbers quickly and easily. Digital: This calculator adopts a large LCD screen which displays the counting data clearly you can use it without worries. Application: This key chain decoration is suitable for handbag schoolbag backpack purse wallet and other bags as a decor. Electronic: This kind of calculator is operated by a button battery you do not need to charge it or change battery frequently. Quality Assurance: Our product will definitely win your heart with its premium quality! If you have any inquiries please contact us. Specification: Material: ABS Color: pink green blue Size: approx. 5.7*3.9cm/2.24*1.54inch Battery: build-in 1x AG10 button battery Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. includes: 1 Piece Calculator Keychain(with 1 Piece AG10 Button Battery)