I have a digital Graco. It’s great. You can see on the screen if there is connection. Plus, when it detects sound, you hear it and your piece also vibrates. So if I put my baby to sleep, i can wear it on my skirt like a cell phone (a bit bigger) and even if its under my sweater and the baby is only whimpering I can feel teh vibration.
I bought it in Target for like $70.00.
$40.00, which was very basic, but did the trick, if I as downstairs and my baby was sleeping upstairs.
Basically, no offense to previous posters I dont think I would need a picture one for a sleeping baby, unless u use it for letting your baby play alone in the room.