DPA MHS6005 Lav Microphone Holder for Strings
The holder should be mounted between the tailpiece and the bridge. It can be turned upwards or downwards so that the mic will be placed either over or under the strings, depending on the desired sound color or sound level. The Lavalier Miniature Microphone is secured by its cable in a little clip, while the holder itself has a firm grip on two strings of the instrument with small hooks.
Sold as a set of five pcs.