Dave: Ms Chan's new microphone is really cool, isn't it? Cathy: New microphone? I didn't notice she's got a new microphone. Dave: How can you miss it! Its silver, stremlined look is very eye-catching. It's the latest model. You can even take a picture with its built-in digital camera. Cathy: Dave, I'm confused. Why would Ms Chan want to take photos while speaking in her microphone in class? Obviously Dave is talking about something else. What do you think Ms Chan bought?