Transmetal driver in the Beast Wars TV series.
The Transmetal driver, referred to by the Vok as a Datasphere, is a small spherical device that Megatron obtained while on prehistoric Earth (exactly how he came across it is unknown), where many other traces of the Vok were found. It served as a receptacle of scanned data the Vok accumulated from one of the Beast Warriors (presumably Optimus Primal), but according to an analysis by the Maximals' computer it was altered by Megatron. The driver was a necessary part of a transformation into a Transmetal 2.