The Yale YRFID-BOX-170 is a large capacity radio frequency identification (RFID) blocking box designed to stop keyless vehicle theft by preventing thieves form copying the car key fob information. The box measures 170mm x 120mm x 90mm and has internal nano-electromagnetic interference (EMI) shielding materials with insulated cloth lining to prevent the transmission of signals. It is covered in premium leather and has a metal buckle to fasten and lock the box.