2.4G Wireless WiFi Transmission: The digital signal transmission is stable and interference free. With encryption, the digital signaltransmission has good security. Two Way Talk: With a built in microphone and speaker, you can talk to your baby from a distance without having to run back. Use the two way talk back intercom function to comfort your babies. Infrared Night Vision Sensor: With 2.0 inch high definition LCD screen, infrared distance of 5m and IR CUT automatic switching, the monitor can achieve day and night monitoring. Lullaby Songs: Built in baby sleep lullaby with adjustable volume. It can soothe the baby to sleep. Makes it easier for you to stay with your baby. Temperature Monitoring: The monitor is with temperature display, which Celsius and Fahrenheit can be freely switched to have a great monitoring of the baby's daily room temperature.