Set up and use your Beats Flex earphones after service - Apple Support
Beats Flex replaces BeatsX for $49 with USB-C charging, longer battery life, Apple W1 chip - 9to5Mac
Amazon.com: Beats Flex Wireless Earphones – Apple W1 Headphone Chip, Magnetic Earbuds, Class 1 Bluetooth, 12 Hours of Listening Time, Built-in Microphone - Black (Latest Model) (Renewed) : Everything Else