This is a remote control for Sony AV systems. It is a genuine remote control designed to operate Sony AV systems (such as amplifiers and receivers). It has buttons to switch operation modes for multiple devices, including DVD, TV, tuner, MD, and CD. It has function buttons specific to AV systems, such as "MASTER VOLUME" and "SOUND FIELD." It is likely that production has been discontinued, and it may be difficult to obtain a new one.