With some control panels, it makes sense to acknowledge entries via selective haptic feedback without causing the entire control surface to vibrate. Piezo components are perfect for this because they ensure targeted, selective lifting movement of the user interface (local feedback). This short vertical movement is perceived by the user as intensely as pressing a button. Piezo components require a high electrical voltage and are therefore a rather demanding technology. We would be happy to help you determine which system offers the greatest benefit for your purposes.