An evaporated fuel leak detector detects leakage of an evaporated fuel generated in a fuel tank. Lane boundary detection and tracking is essential for many active safetyADAS application. The portable communication unit includes electric circuits having a predetermined communication function, a receptacle case holding the electrical circuits, a cord connected at one end thereof to the electric circuits and extending to the exterior of the receptacle case, and a magnetic-side socket of a magnetic connector provided at a front end of the cord. Once the device is validated and found to be healthy, the fabric is notified via a BCN, and the device can be made visible to the network. The objective optical system satisfies Conditional Formula : 15. The invention also concerns the methods for making such a material and its uses.