iHome Wireless Optical Mouse (IH-M820WB) Wireless mouse Comes with stowable usb nano receiver Plug and play with no syncing needed 1600 dpi optical sensor Switch on bottom of mouse raises height Wireless mouse Comes with stowable usb nano receiver Plug and play with no syncing needed 1600 dpi optical sensor Switch on bottom of mouse raises height 2.4 ghz wireless frequency