Product Engineering and Technical Design Petervary Multifunctional Piano Bench by Maform Petervary is a smart piano bench designed for practice, teaching and performance. The upper part of the bench slides sideways, so the pianist can reach the keys at the far ends of the piano while keeping a comfortable body posture. The height of the seat is adjusted by a motor. The preferred height can be set manually on the control panel, or automatically through a personal profile stored on a contactless tag or in a mobile application. The form follows the fine details of grand pianos, so the bench suits classical instruments.