JAN 4953103473713 ■ Price 3899 yen (tax included) ■ Item Condition Purchase Date: September 2024 Condition: Used only once. After that, it was stored at home in its box. ※ Immediate purchase is OK. ※ Will be carefully packaged and shipped promptly. ※ Infrared receiver included, one AA battery included [ Product Description ] Color Black Connectivity Technology USB, 2.4GHz Wireless Features Ergonomic Design, Multi-function Buttons Movement Detection Technology Optical Size ‎9.4 x 4.57 x 12.45 cm; 113.4 g About this product 8-button model boasting overwhelming operational performance. Changing the common sense of index finger operation, the index finger operation type wireless trackball "DEFT". It is an index finger operation type wireless trackball "DEFT" boasting overwhelming operational performance. In addition to the left and right buttons, "forward/back" buttons, a tilt wheel, and three function assignment buttons, it is equipped with 8 buttons. The sensor that detects the movement of the trackball is equipped with a high-performance optical sensor of gaming grade, and the optimization of the new high-performance lens and surrounding optical design realizes outstanding pointer tracking performance. By adopting a large artificial ruby with a diameter of 2.5mm as the support ball, the operability is improved. In addition, the larger diameter of the support ball makes it less likely to be buried in dirt such as hand grease, reducing the frequency of maintenance.