Systems and methods of enhanced real-time communications between WiFi devices. The holder made from plastic material and comprises adjacent holder sections connected with each other via at least one elastic hinge and joined on the opposite side by fixing means, such as \u2018click\u2019 fixing means. The interlayer is formed of a conductive ceramic. The sleeve has surface roughness Rz ranging from 5 \u03bcm to 20 \u03bcm. Further, in the evaporated fuel treating module 20, also a two-way valve 10 and a bypass solenoid valve 12 may be integrated into the unit.