we have the BT digital baby monitor plus,its very good,shows room temp/lights up if it gets to hot,as well as sound it also lights up green to red depending on the level of noise,it has a light button on your unit so you can turn the light on which is on the bedroom unit without going in,you can also talk into the babys monitor without going into the room so they can hear you,we got ours from Mothe Care,i think it was around £70-90the range is 100m i think 