Why do you need the Faraday Box? Most keyless fobs carry identification chips that pick up radio signals sent out by their car. The vehicle recognizes the fob when it's in range and unlocks the doors. Keyless ignition systems work in the same way - enabling cars to start when the key fob is detected in the cabin. Criminals can exploit this via a wireless relay attack. Using a radio frequency relay booster, it's possible to pick up and then transmit a key fob signal to trick the car into thinking a fob is present. This enables entry and theft from the cabin or boot - and, in the case of keyless ignition systems, theft of the vehicle itself. Thanks to its 100% signal jamming capability, TICONN faraday box can completely isolate your fob to make such attacks impossible. How does the TICONN Faraday Box work? Our faraday box make your cars safe by stopping signals being sent or received by your key fob or any other device containing data. Remove your key from the faraday bag and signal reception is restored immediately, enabling normal usage. Attention: Please do not wash the faraday bag/box; keep the interior dry, or it may lose signal-blocking function. Retail Package includes 1 x Faraday Box 1 x User Manual