This is an "AKG Pro Audio C520 L Head-Worn Condenser Microphone". It has an XLR connector (commonly used in professional equipment). This microphone was bought in error, and the mistake was noticed only after Amazon's return window had expired. You can find details and customer reviews on its Amazon page: https://www.amazon.co.uk/dp/B000T9HQ5E

If you want this item, you MUST send me: (1) your telephone number (easier for arranging collection than exchanging chat messages); and (2) your preferred days/times for collection (most days/times will be okay with me). If you fail to provide those two pieces of information, then I will probably ignore you as being a likely time waster.

Head-worn condenser microphone (never used) (Caversham RG4)