Dome Spy Camera has a Built-in DVR system which can be just plugged and it will start recording. This device records all its files to the TF card. It can support from 1GB to 16GB TF card. It can record video & audio as well in VGA or CIF format which can be set by the "user set tool". With this device you can perform real-time observation by connecting it to the computer. Its Infrared night vision feature supports recording in low light. Its most prominent features are its Loop record function which means that when the memory is full, the new recorded files will cover the earliest files numerically.