Omax DH-166 is a wired professional dynamic microphone. I couldn’t find a reliable manufacturer/manual source confirming the exact contents of the box, so I wouldn’t want to invent the accessories.
What you should normally look for inside
* Omax DH-166 microphone
* Microphone cable — often supplied with this type of wired microphone, but it should be confirmed from the actual package.
* Microphone holder/clip — possible, depending on the package version.
* User/instruction leaflet — possible.
Connecting it
For a typical wired dynamic microphone, connect the microphone cable from the mic to a MIC input on your mixer, amplifier, audio interface, or powered speaker. Dynamic microphones generally do not require phantom power.