The THMB, pronunced "thumb", is essentially an improved version of VBD that has been miniaturized to fit inside a PDA-like case. The device, which is meant to be handheld, also comprises an LCD screen that allows for the generation of co-located haptics/visual feedback. The THMB stimulates the user's thumb and is mounted on a vertical slider so that it can be dragged up and down along the left side of the case.
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