Secure Start raises the standard of clarity in monitors - giving mobile moms a clear view of baby at all times, even after dark with powerful Night Vision. Best-in-class performance includes great sound communication: when baby's up and making sounds, VOX mode automatically turns Secure Start on so you can sleep peacefully when baby sleeps. The 2.4GHz digital format ensures 100% privacy. The compact receiver is palm-size for easy travel from room-to-room. Plus, it can run on rechargeable batteries (included for the monitor) or be plugged in for standard AC operation.