The Faraday envelope prevents the 100% from communicating between any external radio-wave device and the device you put inside (smartphone, tablet, car keys, etc.).
Multifunctional Faraday bag: It is constructed of 3 layers of high-quality, highly shielding material that can provide a total signal blocking function. This includes car key signal, WiFi, RFID, operator signal/network (SIM) 3G, 4G, 5G, Bluetooth, radio waves, GPS, NFC, etc. Shields any EMI, RFI, EMF radiation.
Dimensions: Small (21 x 10.5 cm)
Samfolk's anti-tracking Faraday is spacious enough to hold smartphones or folding mobile phones with screens of up to 7.8 inches. 7.8 inches
At the same time, it will not be possible for the device to send signals of any kind to the networks it usually connects to, completely blocking communication.