[Home](./index.md) > [sip.js](./sip.js.md) > [InvitationProgressOptions](./sip.js.invitationprogressoptions.md) > [sessionDescriptionHandlerModifiers](./sip.js.invitationprogressoptions.sessiondescriptionhandlermodifiers.md) ## InvitationProgressOptions.sessionDescriptionHandlerModifiers property Modifiers to pass to SessionDescriptionHandler's getDescription() and setDescription(). Signature: ```typescript sessionDescriptionHandlerModifiers?: Array; ```