This is a 43-M43 compatible mount adapter with electronic contacts, enabling AF functionality. It's used to mount Four Thirds lenses on Micro Four Thirds camera bodies. I've confirmed its operation with my lens (Olympus ZUIKO DIGITAL ED 18-180mm F3.5-6.3) and an O-MD E-M5 mark II. (I apologize, but I don't have other compatible items, so I won't be able to answer questions about compatibility. Thank you for your understanding.) - Items for sale: Mount adapter body only (inspected) - Condition: Installed only once for inspection (like new) - Type: Electronic mount adapter - Compatibility: 43-M43 - Color: Black - Features: With electronic contacts Thank you for viewing.