I built a whole-home ad blocker with a $7 ESP32-S3 board - and it took just minutes ...

The focus-enhancing device is still priced at $249, but the first 3,000 units will be discounted to $199.

Lauren (Hansen) Holznienkemper is a lead editor for the small business vertical at Forbes Advisor, specializing in HR, payroll and recruiting solutions for small businesses. Using research and writing ...