Peoduct Name : Mini Calculator;Material : Hard Plastic, MetalColor : Gray;Powered By : 1 x LR1130 Button Cell Battery(not included)Size : 6.3 x 3.7 x 0.8cm/ 2.5 inch x 1.4 inch x 0.3 inch ( L*W*T);Key Ring Diameter : 2.5cm/ 1 inchTotal Length : 9.5cm/ 3.7 inch ;Net Weight : 8gLCD display and press keypads make the 8 Digits Calculator easy to use.20 Keys included functions for basic four arithmetic operation, reposition and percentage.Pocket LCD Digital Calculator with key chain.You can hang it together with your keys.Package Contents:2 x Mini Calculator with Key RingOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.