PLK Technology’s RoadScan black box is designed to provide drivers with increased safety and security with its continuous recording function and video event data recorder (VEDR) function. With six main features that differentiate RoadScan from other vehicle black boxes, the key features include VEDR function, a CCTV (closed circuit television) function, digital tachometer, and dual memory. When the vehicle experiences impact from a crash, the RoadScan will detect the shock automatically and record the image 15 s before and after the impact. The digital image tachometer will record driving route, speed, and time. These data can be transferred to an SD card and downloaded to a PC. Its dual-memory card allows saving data both to internal flash memory and SD card. RoadScan comes with 1G memory card that can save images for 5 min with high quality or 100 min with medium quality.