Anyone have one or know of a good brand?

Lyra just started sleeping in her own room 2 nights ago (was in our room until then). She seems fine, but I worry when I can't see her. I'm probably crazy, but I worry about the weirdest things, especially when she isn't making any noise so I can't hear her on the regular monitor. And barging into her room during the night isn't helping my sleep or hers!

Thanks!