Features: 【Portable Design】Compact circular keychain calculator measuring 10.8x5.2cm, easily fits in pockets or attaches to keys. Perfect for students to carry conveniently between classrooms and libraries without bulk. 【Silent Buttons】Features ABS+silicone construction with quiet button presses. Ideal for noise sensitive environments like study hall and libraries where disturbing others must be avoided. 【Basic Math Functions】Performs essential calculations including addition, subtraction, multiplication, and division. Helps students quickly solve homework problems with efficient accuracy. 【Multi Purpose Display】8 digit screen allows simple financial tracking like expense recording or small budgeting. Useful for individual money management alongside academic needs. 【Score Tracking】Enables exam result logging and grade comparisons to monitor learning progress. Assists students in analyzing performances trends for better study efficiency. Specifications: Materials: Abs+Silicone Size: About 10.8x5.2cm/4.25x2.04inches Color: 6 Colors Optional, Please Refer to Pictures to Select Package Includes: 1Pc Miniature Quiet Keychain Calculator note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.