When an moving object is detected within the cameras recording range, the camera will start recording and send an alert to APP on mobile. When you are away from the camera, you can watch real-time video recordings online. When the memory is full, the latest video recording will overwrite the earliest video recordings. The recordings saved on microSD card can be watched on computer with a card reader or directly watch on mobile phone. The recordings saved on Cloud storage can be downloaded and watch directly on mobile phone. If you worry in the event that your camera is stolen or files corrupted in micro SD additional paid cloud storage is available. Specifications: Item name: HD Wi-Fi Mini Camera Material: ABS Color: Black Visual Angle: 140 degree Resolution: 1080 * 1920P Pixel: 2 million (DPI) Image sensor: CMOS Voltage: 12V/2A Alarm function: Support External Memory: Up to 128GB(not included) Size:160*25*15mm Note: -This camera does not have built-in memory. If you want to better save the camera content or record information. Please use the original memory card of 8G-128G. In order to ensure the normal use of the mini camera, please do not use fake cards, it is recommended to buy memory card