This is an electronic lens adapter made by FOTGA, model number F43 AI. It's an adapter for connecting Nikon AI mount lenses to M4/3 (Micro Four Thirds) mount camera bodies. 【Compatible Lenses】 Nikon AI / AI-S mount lenses 【Compatible Camera Bodies (Examples)】 Panasonic Lumix G series / Olympus PEN / OM-D series, etc. M4/3 mount models 【Specifications】 ・Full-function electronic adapter ・Metal construction ・With electronic contacts (Supports aperture value communication and AF on some models) ・High-precision positioning 【Included Items】 Original box included (see images) The appearance is in good condition, but as a used item, there may be small scratches and dirt due to aging. Please check the images for details. Feel free to ask any questions before purchasing. Thank you.