100% new and high quality! There are calculator and keyboard modes. 2.4G wireless connection mode. Large 12-digit LCD display 8 calculator function keys Working frequency: 2.4G technology Interface: wireless USB 2.0 interface Receiver: USB receiver, 10M from computer System requirements: compatible with for XP/7/8 Working temperature: 5C-50C, storage: -20C-65C Relative humidity: 10% to 10% RH 25, 25 Storage: 5% to 95% RH Compatible with 2xAAA batteries (not included) Colour:Black Material:ABS Package Contents: 1 x keyboard 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection 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.