The diNovo Mini is a clamshell input device compatible with PCs and the PlayStation 3. It features a backlit QWERTY keyboard with media keys, and a combination capacitive trackpad and directional pad.
There is a cover under the keyboard in which are located the battery and the USB, just put it in the computer and you’re ready to go, if your device doesn’t come with USB then it is useless.
It supports Bluetooth 2.0. The USB that Hamdi is referring to is a USB dongle that can be stored within the keyboard's bottom compartment that also houses the Sync button. If your PC has Bluetooth already then you likely don't need use of the dongle.