From Apple’s new iPad to the revolutionary Nintendo DSi, it’s hard to find a single piece of portable technology that’s not sporting a flashy new intuitive touchscreen. While the latest wave of tech may have ruled the tactile keyboard irrelevant, a growing number of technology purists believe that the touch-powered screen isn’t the perfect input and control interface.

Design studio dsLabs has put together what seems like the ultimate in bizarre touchscreen accessories: a portable knob for touchscreen device users. Strangely enough, it’s a welcome addition to many touch-powered devices, enabling users to control them similarly to a manual stereo control system or analogue rotating dial.

The device is useful for more than just turning dials, users claim. dsLabs believe that the prototype control knob can be used as a portable stylus, giving phone users a greater degree of control for mobile phone applications and portable gaming.

While it’s unlikely that touchscreen accessories will catch on with the general public, serious touchscreen gamers and dedicated phone users might consider the investment. If greater control, a scratch-less display, and unique input are important to you, adding a control knob into the mix could lead to some interesting results.