What are the button functions on my IFROGZ Charisma Wireless Earbuds?

Button Functions:

Raised bump button (Up button)
- Quick press – Volume up
- Long press – Track next song

Middle button (Center button)
- Quick press – Play/Pause/Answer call/End call
- Medium press – Voice control (Siri® and Android®)
- Long press – Power on/Power off/Deny call

Recessed groove button (Down button)
- Quick press – Volume down
- Long press – Track previous song