The Omnitrix 2 is the Omnitrix Dan uses to battle with.
The Omnitrix 2 has different colors that mean different things.
Green- Charged. If blinking Red, it's detecting radiation.
Yellow- Scanning new DNA.
Purple- Eon or Ghostfreak's tampering. Can only transform into Heatblast.
All of Original Ben 10.
All of AF Ben 10.
All of UA Ben 10.
All of OV Ben 10.