We use a Summer Infant In View Digital Video Monitor. It is not Bluetooth, it has a camera that sends a signal to a monitor. If it was Bluetooth we would be able to view it on our phones. There are models like that, just at a higher price. Our model claims to have a 600' range. Being outside, the wind and trees can affect that range. I have found that we can usually go 2 maybe 3 sites over and still get a signal.