Although there are countless TWS earbuds available in the sub-US$50 area of the market, the Tronsmart Onyx Ace Pro is one of the few capable of bringing together Qualcomm aptX support and 13 mm drivers. Now available on Tronsmart's website, GeekBuying, and AliExpress, the Onyx Ace Pro will also hit Amazon next month.
https://www.notebookcheck.net/Tronsmart-launches-the-affordable-Onyx-Ace-Pro-TWS-with-Qualcomm-aptX-support-and-13-mm-drivers.621169.0.html