As Director of your department, keeping up with technology is essential in your job and your department could really benefit from a new tool to make communication more effective. However this is something that you had not anticipated the need or planned for in your budget.
Research some new technologies and choose one that you would like to implement in your department to improve communication. Write a memo to your supervisor requesting the technology. Cite your source(s) and make up any details you need. Focus on quality of writing as opposed to length.