ATTENTION THE VOLTAGE IS 220V AND THE PLUG IS EUROPEAN LARGE CAPACITY BATTERY AND VOX MODE Baby monitoring lasts 12 hours with VOX-on (power saving mode), 8 hours with screen-on. VOX mode is a power saving mode with sound activated, you can concentrate on your things until the monitor is activated by the sound of the child unit PLUG AND PLAY AND EXPANDABLE TO 4 CAMERAS The baby camera is plug and play, no setup required. One parent unit monitor can be paired with 4 child unit cameras. (Monitor and camera included) You can take care of all your children with one monitor Automatic night vision The automatic light sensor accurately detects light conditions and automatically switches between day and night modes. Visibility up to 15 feet in complete darkness extends your vision at night; Don't miss a moment, day or night. darkness extends your vision in the night; Don't miss a moment, day or night. Temperature monitoring, 8 lullabies The camera is equipped with a temperature sensor, letting you know that your baby is comfortable and safe. Soothe your baby by playing lullabies remotely as if she were in the same room with her little one. Audio bidireccional cristalino The crystal-clear two-way audio feature makes conversations on both ends as clear as if you were in the same room with your little one. Portability The application of frequency hopping and digital encryption technology ensures a secure and reliable connection. The portable parent unit can move with you, allowing you to hear, see and talk to your baby no matter where she is in the house.