If the area is larger than the effective area of ​​the mask used, it is recommended to use multiple battery covers to ensure the shielding effect. Power supply, antenna and host specific support, so in one-time debugging and debugging, please try not to use them interchangeably to ensure the desired effect. Mobile cell phone jammer are dedicated to protecting the internal components of accelerated aging devices from corrosive gases and liquids, dust and moisture. When placed outdoors or in the wild, it should be noted that mice, ants and other destructive animals infest the environment and attach protective devices. The maintenance shield is a maintenance-free device and requires no maintenance. It is forbidden to use chemical solvents and water to avoid wiping the surface and cutting machine. If the protective cover is useful, it should be stored in a dry, well-ventilated place to prevent mobile phone jammers to avoid long-term exposure to salt spray and harmful gases. This shield has a one-year warranty and lifetime maintenance. The ultra-high-power mobile phone jammer shields the mobile phone signal shielding layer and shields the entire building.