The Aputure DEC Wireless Focus & Aperture Controller Adapter for EF and EF-S-Mount Lenses to E-Mount Cameras is a wireless remote adapter controller that allows you to mount your EF/EF-S mount lens on your E-mount camera and control your lens directly, allowing you to smoothly control the focus and iris setting of your lens without relying on your camera's electronics. OLED windows on the adapter and the remote hand grip display lens information.