It’s a capacitive touch controller that plugs into a USB Type-C port and lets you control the volume on any Windows, Mac, or Linux laptop by sliding your finger across the surface.

iOS 18.2 lets you add a volume control slider to the lock screen. This setting is disabled by default, so here's how to turn it on.

1. Open Settings. 2. Tap Accessibility. 3. Tap Audio & Visual under Hearing. 4. Tap the toggle next to Always Show Volume Control. Now, the next time you're listening to music or a podcast at the gym ...

Prior to 2022, the volume slider was a familiar presence on the Lock Screen whenever media was playing. When Apple released iOS 16, however, it removed the control without explaining the reason.