Great as a backup!

Not sure Id use this as an everyday baby monitor- but I use it when I have my besties 1.5 year old daughter over every Friday night, and its good enough to alert me to issues while Im awake and watching tv ( she sleeps in my room in her playpen so I dont need a monitor while Im sleeping.) It doesnt bug me when shes fine, but whenever a shuffle or a whine happens it comes through loud and clear. Great for a backup! Totally worth 2$. Use it with an iPhone 4 and an iPad 2 over wifi.

Navvan about Baby Monitor - WiFi & Bluetooth w/Background Audio, v1.3