How do I use the Find My feature to locate my Beats Flex?

When your Beats Flex are nearby one of your Apple devices, use the Find My app to play a sound to locate them or see them on a map. If your Beats Flex are lost or missing, Find My can still help you track them using the global Find My network made up of hundreds of millions of Apple devices that use secure Bluetooth technology to detect and report their approximate location. (Page 3)