Only after inserting a Micro SD memory card can the dash cam start recording and storing video Cyclic recording ensures that the camera does not stop recording when the storage is full. The camera automatically skips the oldest files on the memory card, Cyclic Recording Supports Micro SD memory card up to 128GB max The Dynex camera adopts a safer design to essentially eliminate safety risks in the summer, as the temperature inside the car may reach high levels, as the Sunpack dash cam withstands temperatures up to 70 degrees Celsius. It features a built-in battery with a capacity of 400 mah This device has two cameras, a 360-degree adjustable front camera with 4K ULTRA HD resolution and a 1080 rear camera that allows for simultaneous recording of videos with a wide and wide recording angle of up to 170 degrees. It improves image quality day and night and helps identify details such as driver actions and road features that may prove your innocence. Easy and fast Wi-Fi connection