Optical Lens: This 1.55X wide lens adopt premium optical lens for high light transmittance and high definition image. Simple Installation: This action camera lens are easy and convenient to install and operate, with small and portable design. Practical Portable: This action camera lens can effectively broaden the 42% horizontal shooting field, providing more convenience. Stable Performance: This action camera lens has stable and excellent performance to provide movie like texture while recording videos. Suitable Object: This action camera lens are practical and perfect accessory for Hero 9 Black action camera.