Help Identify OXFORD SWITCH

Hi Guys, I bought a bike in August and it has a Oxford Switch that can turn on and off without the bike key in. Im assuming its directly connected to the battery if it can do that. When i disconnected the battery there was no extra wire attached other than the basic + and - rings. I've ridden with it on and off and have felt no difference as of yet, after googling the only company that comes up is Oxford heated grips, but My grips look stock based on any internet pictures I've found and did not feel anything warming up. I would greatly appreciate if anyone could help me out to identify what this switch actually does. (Its the green light that you can see at the bottom of the picture)