Release notes
The Sony WI-XB400 Bluetooth Earbuds with Multipoint was released in Sep, 2019 at the price of $59. It uses Bluetooth 4.2 with support for AAC, SBC codecs.
Sony WI-XB400 Extra Bass Bluetooth earbuds are a standard set of earbuds designed to wear all day. They offer all basics for calls and music with a kick in bass. Their battery life is rated 15 hours between charges.
Flat cable and durable design - Sony WI-XB400 are rivals to Beats Flex Apple's neckband Bluetooth earbuds
Sony WI-XB400 have average noise isolation capacity which partially contributes to its excellent sound imaging.
Small earbuds with eartips should fit most ears. They are comfortable to wear for long periods of time.