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