Amazon Polly is one of the AWS services that enables your application such as IoT program to talk using lifelike speech. You can find this service at https://aws.amazon.com/polly/. You can see it in the following screenshot:

If you have an active Amazon account, you can access Amazon Polly at http://console.aws.amazon.com/polly/ through a browser. Currently, Amazon Polly provides two features—Text-to-Speech and Lexicons. You can test these features on the browser.

In order to test the Text-to-Speech feature, click on the Plain text tab and fill a text or message. Then, select the Voice model that you prefer. Once done, click on the Listen to speech button to listen to speech from the text/message:

In the next section, we will develop a program to access AWS Polly from Node.js.