3.5 inch TFT LCD screen; 2.4G ISM digital public frequency; Effective range would be in free field 300 meters; Specification: 3.5 inch TFT LCD screen;2.4G ISM digital public frequency;Effective range would be in free field 300 meters;Built-in backup battery for indoor phone;Maximum 2 cameras and 4 monitors at same time in a system;On screen display manual; Technical data:a.Indoor monitor Screen3. ...
