Hubble Listen Audio Baby MonitorHubble Smart Listen Audio Baby Monitor 5012786050099 Introducing Hubble Listen, the easy to use, Plug n Play audio monitor from Hubble Connected. Hear your babys every coo and cry with DECT wireless technology which provides clear audio transmission, eliminating background noise within a range of up to 1000 ft 300m The portable parent unit comes with volume control and visual sound level indicator. Experience Smart Parenting with the HubbleClub App.