niceEshop(TM) 150Mbps 2.4GHz RTL8188 Chipset Mini Ultra Nano USB Wireless WiFi LAN Network Adapter(Black) Material:Silica gel; Size:21.5x17.5cm/8.5x6.9inches Precise surface enhances the precision of mice at fast speeds Provides excellent tracking surface for your mouse Easy to wash and keep clean Suitable for rubber mouse