Sony SBH20 Stereo Bluetooth Receiver and Headset w/Mic, complete in box and in working condition.
Box, instructions, USB charging cable and in ear headphones with adapter tips for different fit included. Headphones never used, only the Bluetooth receiver, which was just charged and confirmed to pairing (used my Pixel 8 Pro) and in working condition with working mic. Here is the online manual: https://www-support-downloads.sonymobile.com/sbh20/userguide_EN_SBH20_4.pdf
This enables you to use your favorite 3.5mm jack headphones with your Bluetooth equipment. The receiver has a built in mic with a clip (to attach to clothes), can fast forward, rewind, volume up and down, pause, play, answer and hang-up phone calls. The receiver also has One-touch connection (NFC) and multi point connection (all detailed in the link above to the online manual).