You can customise what the press-and-hold action does on supported Beats. For example, you can set the left button above the 
logo on Beats Studio Buds + or the “b” button on Beats Fit Pro to switch between noise control modes and set the right button to activate Siri or another voice assistant.
Wear your Beats and make sure they’re connected to your iPhone or iPad.
Go to Settings 
, then tap the name of your Beats near the top of the screen.
Tap Press and Hold, then Left Earbud or Right Earbud.
Tap the action you want to assign:
Noise Control: Switches between noise control modes (Off, Transparency and Noise Cancellation) when you press and hold or the button above the logo (on Beats Studio Buds +).
Siri: Activates Siri when you press and hold or the button above the logo (on Beats Solo Buds or Beats Studio Buds +).
Wear your Beats and make sure they’re connected to your iPhone or iPad.
Go to Settings , then tap the name of your Beats near the top of the screen.
Tap Press and Hold, then tap the Volume Control switch to turn it on.
Tap Left Earbud or Right Earbud, then tap Volume Up or Volume Down.
The opposing control is automatically applied to the other earbud.
Wear your Beats and make sure they’re connected to your Mac.
Choose Apple menu 
Do either of the following:
Assign noise control or Siri to the left or right earbud: Click the pop-up menu next to L or R, then choose Noise Control or Siri. The Noise Control option lets you cycle through noise control modes (Off, Transparency and Noise Cancellation) when you press and hold or the button above the logo (on Beats Studio Buds +).
Assign volume control to the left or right earbud: Turn on Volume Control, click the pop-up menu next to L or R, then choose Volume Up or Volume Down.
Wear your Beats and make sure they’re connected to your Android device.
Go to the Beats app 
Scroll down, then tap Press and Hold.
Tap Left or Right, then select an action:
Noise Control: Switches between Active Noise Cancellation and Transparency mode when you press and hold or the button above the logo (on Beats Studio Buds +).
Voice Assistant: Activates your Android device’s voice assistant when you press and hold or the button above the logo (on Beats Solo Buds or Beats Studio Buds +).
Wear your Beats and make sure they’re connected to your Android device.
Go to the Beats app
Scroll down, then tap Press and Hold.
Tap the Volume Control switch to turn it on.
Tap Left or Right, then tap Volume Up or Volume Down.
The opposing control is automatically applied to the other earbud.
Note: When Volume Control is turned on, noise control modes (on supported devices) and Siri (or another voice assistant) are not available.