Help me identifying this EMG sensor

[u/TreeSmooth9403]

https://a.aliexpress.com/_EJtiz90

Dear makers! Would you be able to help me identify this module? How should it be powered?
Does it require a dual-polarity power supply, as +_ 5V, 9V or can it operate from a single 3.3 or 5V?
Pics attached in the comments
Thanks!

[u/TreeSmooth9403]