product description Frequency:2.4GHz FHss Data Rate:4 Mbps Power Adapter:100-240VAC 50\60HZ LCD Screen:5.0 HD TFT LCD(1280*720px) *Auto Infrared Night Vision Channel bandwidth: 3.3758MHz Transmission Range: UP to 960 feet/300 meters (Open space - No obstructions) Input Voltage 5V 1A Rechargeable battery (pre - installed in parent unit): Model YB905560, 3.7V, 4000mAh Transmition Power: 18DB Image sensor type: 1/4" color CMOS IR LED type: 940nm Operation Enviroment: Indoor use only: temperature: 32-104/0-40; Humidity: 5%-90%rh(relative humidity) *5.0 inch HD screen,more bigger, see better *TaIk to the baby,Two way Interaction *Temperature monitors the temperature of the baby's room.with alerts when it's too cold or too hot. *360° panoramic preview of the room,full coverage and no blinf pot,won't miss any details of the baby Package included: 1 x 5 Inch SM50 Baby Monitor