Hello I need to know what is the operating system used on the edge and how can i know the edge model 

You can determine the model per the following article - https://help.mypurecloud.com/faqs/can-determine-version-number-edge-standard-within-genesys-cloud/

You should also be able to determine the OS via API. For more information see - 

https://community.genesys.com/digestviewer29/viewthread?GroupId=19&MessageKey=43960d34-dc81-4b0b-bef7-50c8efa5663b&CommunityKey=bab95e9c-6bbe-4a13-8ade-8ec0faf733d4