Description: The product is used to monitor different rooms at home. If a child or elderly person is alone in a room, people in other rooms can observe people in the room and detect the situation in time The display has a built-in lithium battery which can run continuously for about 3-5 hours. When the power saving mode is on, it can work connected for about 12 hours the camera is powered by an external power supply to ensure long-term security and monitoring With built-in lullaby, help your baby sleep two-way voice support speak, you can talk to your baby conveniently with temperature monitoring function Specification: remote application: not supported transmission frequency: 2400MHz screen size: 2.8 inch LCD display camera pixels: 300,000 pixels Screen resolution: 320*240P (standard resolution for small screens) battery: lithium polymer / 2200mAh, 3.7V transmission method: FHSS (short distance transmission) Cry detection: volume detection transmission distance: line of sight about 200 meters Timed feed: supported Angle of view: about 75 degrees Power saving mode: VOX voice controlled power saving mode Intercom mode: two-way intercom Monitoring of ambient temperature: support Music: Built-in lullabies Battery: large capacity lithium battery built into the screen Night vision: infrared night vision about 5 meters Working time: 12h in power saving mode, 5h in working mode Electronic amplification: 2X electronic amplification