In a blog post, the company said the device had a Snapdragon 730G SoC, Titan M security module for on-device security, six GB of memory and 128 GB of storage with an even bigger battery that lasts all day.
The size of the battery was not specified but this was an issue with the Pixel 4 which had a very small battery 2800mAh.
The phone will be made available in Australia, Canada, France, Germany and India later. It will be sold in Ireland, Italy, Japan, Singapore, Spain, Taiwan, the UK and the US right away.
The new smartphone has features like Recorder, which can connects with Google Docs to save and share transcriptions and recordings in English.
Pixel 4a will include the Personal Safety app for real-time emergency notifications and detecting car crashes; this feature will only be available in select languages and countries.
Pixel 4a also has Live Caption, which provides real-time captioning in English for video and audio content.
The device will also be sold from 20 August on BestBuy.com, Amazon and other outlets, as well as US carriers including US Cellular and Verizon.
The company said 5G models bearing the names Pixel 4a (5G) and Pixel 5 would be available in the US in autumn, with prices starting at US$499. These devices will be sold in the US, Canada, the UK, Ireland, France, Germany, Japan, Taiwan and Australia.