A lithium ion capacitor having a high capacity retention at the time of continuous charge at a high temperature and excellent durability. The image enhancement apparatus may determine luminance data of each of a plurality of pixels, and may adaptively determine a conversion ratio according to the luminance data to apply the conversion ratio to an input image, thereby performing image-enhancing. In other examples, the response provided to the user may be audible as well. The device also includes a base member attached to a distal end of the snare support member and has a longitudinal axis substantially aligned with the longitudinal axis of the snare support member.