BST-loaded SRRs comprising tunable metamaterial, encapsulates all of the tunability within the SRR circuit. These lasers exhibit wavelength tunability by changing the thickness of the active layers. The aforementioned tunability of properties is potentially useful in optics and photonics. Varactor diodes are symmetrically introduced, which results in dynamic tunability for the whole structure. This can allow for nonlinear behavior, such as tunability in real time. CMPs exhibit a high level of tunability with respect to surface area and pore size. Copolymers, due to their unique tunability of properties, can have a wide range of applications. It grew popular with tuners due to its great strength, tunability and simplicity. The property that makes these SMAs such a big research topic is their tunability. The XPAG engine is well known for its tunability. They are often used in radio transmitters where tunability is not required. Bandgap tunability helps researchers with designing their solar cells. Moreover, the tunability of swelling effect is controlled by polyelectrolyte effect. It was widely used in motorsport in India due to its light weight and tunability.