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. 1 Piece Calculator Keychain(with 1 Piece AG10 Button Battery)