【Car key Signal Blocker :】A car is now stolen every 2 minutes.The criminals use keyfob skimming tools to copy or mimic your keyfob's unique signal code remotely to gain access to your vehicle or keyless entry system.This box is used for blocking all of the signals out when you put your car keys into it. 【Faraday Box,PU leather design:】The outer fabric of this box is made of high-quality pu leather,smooth touch and wearable.It looks elegant and retro, high-end grade.The inner fabric is made of high-quality double RF shielding cloth which guarantee for stronger signal isolation. 【Signal Blocking Box,High capacity: 】This car key safe box can hold AT LEAST 4 car keys.You may put all of your spare keys into this box.Please check the model and size before buying. Key box Size: 4.57 x 2.28 x 3.54 in.