Watch and listen the situation of your baby when you cannot be there. Easily avoid intereference from other 2.4Ghz devices ; Digital RF modulation with frequency hopping (automatically switch RF channels) ; Dynamic select clean channels to avoid interference from other 2.4Ghz devices ; Data privacy protect ; Voice detection function ; Night vision (effective range : 5M) ; Built-in microphone in camera and speaker in the receiver ; Up to 100m (330 ft) transmission range in open space.