The all-metal design ensures excellent EMI shielding. The upper and lower parts of the housing are screwed together with the included screws. The ideal listening protection: Many smartphones and tablets can be eavesdropped on even when turned off, and their cameras can be activated. Such attacks can cause significant damage, especially in the business world. Therefore, during conferences, meetings, and other confidential matters, you should keep your phone in this secure box. The housing can effectively protect your mobile phone from eavesdropping attacks. Mobile, telephone, Wi-Fi, Bluetooth, and GPS signals are reliably blocked thanks to the EMI/EMV/RFI shielding. Photo, video, and microphone functions cannot be activated without your intervention.