Stable signal transmission uses 2.4 GHz wireless digital transmission, which ensures stable signal transmission without loss of sound details. It is interference-free and offers clear sound quality, with a range of up to 200 metres in open space. Two-way communication: With the two-way voice function and night light function, parents can hear directly when the baby makes a noise. With the simple press of a button, parents can soothe the baby by talking to them. Highly sensitive sensor: The monitor's integrated sensor chip is highly sensitive and can monitor the baby's crying or sounds at all times and alert the parents in good time. Built-in microphone and speaker functions enable clear two-way audio communication. Built-in lullabies: With 4 minutes of built-in chord music, baby can fall asleep better. The volume is adjustable, and the mother can control the music, night light and volume of the baby. Versatile application options: Suitable for parents, grandparents and nannies. Also suitable for use in hospitals and nursing homes. With this product, you can easily monitor your children while working or cooking.