Avent Philips device with a microphone to hear and monitor the baby's voice from a distance of 400 meters. Talk to your baby from a distance and reassure them of your presence. Monitor the environment around your little one's room with this wonderful device and enjoy deep sleep without any stress. This device comes with a comfortable night light and is battery-powered, giving you a more confident and secure connection with your baby. The talking range through the device reaches up to 274 meters.