Wheel number / Yes button or buttons: 1: Number 2 / wheel button connection method: wireless (2.4GHz) / Recognition: Optical / wheel button function Series name: 2CF Black Color: /: Yes color variationsASIN: B0098BDPOK Product Dimensions: 20.193 x 14.8082 x 6.2992 cm Deliverable Weight: 0.1678 kg