NOTE
(1) The device without a 3.5mm headphone jack needs a 3.5mm conversion adapter. If there is a problem with the conversion adapter, the volume button will not work, please check before use. (Some adapters support the controller, and some do not. This is determined by the compatibility of the adapter.)
(2) Since the volume button of the wired earbuds is not compatible with computers, laptops, MacBook models, iPod, iPad, Switch, the volume needs to be adjusted on the PC side and other main units.