V-MODA S-80 On-Ear Bluetooth Headphones and Personal Speaker System (Rose Gold) - Manual (Page 13)

Answer a call
Refuse incoming call
Play and pause audio
Skip to next song
Go to previous track
Summon voice assistant
Press once
Press and hold for 1-2 seconds then release
Press once
Press twice
Press three times
Press and hold for three seconds*
MULTIFUNCTION BUTTON 5
*Depending on your devices, there may be restrictions on the use of the voice assistant.