docs: for PR #4784

ACKNOWLEDGEMENTS.md

@@ -1307,3 +1307,4 @@ Further device support has been made with the assistance of users. Please consid
 - [decompil3d](https://github.com/decompil3d) for contributing support for Chtoocy MC82 refrigerator thermometer.
 - [kordek212](https://github.com/kordek212) for contributing support for KKT Kolbe kitchen hood.
 - [bobaoapae](https://github.com/bobaoapae) for contributing support for Veratti V4 3-phase circuit breaker.
+- [alfry82](https://github.com/alfry82) for contributing support for Morento MR5866 air purifier.

DEVICES.md

@@ -434,7 +434,7 @@
 - Kogan 2S and 5 pro air purifiers
 - Lifubide X600 air purifier
 - Meaco Clean CA-HEPA air purifier
-- Morento HY4866-WF and MR7566-WF air purifiers
+- Morento HY4866-WF, MR5866, MR7566-WF air purifiers
 - NAC AP470 air purifier
 - NX-100AP Rapid air purifier
 - Poiema One air purifier