Two Tuna Knobs

 Tuna knobs are control knobs that stick to any touchscreen and let you control DJ and music making apps like you would with dedicated music hardware.

Tuna Knobs stick to your touchscreen using a micro suction cup and translate a turning movement to a touch command. 

Simply stick them on your screen and you are ready to start twiddling away.

Package of two Tuna Knobs.