On air on sale

You know how sometimes you see things in a store and they're on sale, which means they're cheaper than they usually are? Well, the same thing can happen on TV or the radio when they talk about certain products. They might say that something is "on air on sale," which means you can buy it for a cheaper price while they're talking about it on the TV or radio program. It's like a special deal that makes things more affordable for people who want to buy them.