Feature: 1. LCD MONITOR: This baby monitor comes with a 3.5in LCD monitor that ensures you can always see your baby clearly from any angle. With controls, you can switch your baby monitor with the camera and audio view or zoom for clear or close observation. 2. NIGHT VERSION: With night vision function, provides clear lenses, and uses infrared night vision technology to take vivid pictures even in dim conditions. 3. TEMPERATURE MONITORING: With temperature sensor, make baby enjoy the right temperature in the room. The temperature sensor on the camera sends an alert to the parent unit. Make you know when you need to adjust the thermostat. 4. TALK TO BABY: There are soothing lullabies to help babies fall into sweet sleep. Parents can talk or sing into the baby monitor because it has a built in speaker and microphone. 5. 900FT RANGE CONNECTION: Stay in touch with your baby temperature monitor for up to 900ft, with up to 4 camera units expandable per monitor unit. Specification: Item Type: Baby Monitor Material: ABS Display battery: 3.7V 1200mAH lithium battery (display shipped with built in battery) Frequency: 2.4GHz FHSS Operating environment: Only for indoor use, Temperature: 0-40 degree centigrade, Humidity: 5% to 90% rh. (relative humidity) Work range: Up to 900 feet (straight line and open space) Type of red light: 940nm . Package List: 1 x Instruction Book1 x Display1 x Camara2 x Power Adapter2 x Expansion Plug2 x Screw1 x Accessory