Where probably are the speakers?

M: I’d like to purchase a new coffee maker. I saw two items on your Web site. Can you tell me why the prices are so different?
W: Certainly. The M-2 is our latest model. It has a two-liter water tank, a stainless steel body, and three thermostats for safety and performance. A one-year parts warranty is also provided with this model. The M-1 is the hottest model in our store. It can make only two cups of coffee at a time. That’s why it’s a lot cheaper.
M: I don’t need extra features or a large amount of coffee at a time. So I’d like to get the M-1. Can I have a new one instead of the one on the shelf?
W: Of course. Maybe there is one in the stockroom. Let me get it for you. I’ll be back in a bit.