Enhance your vehicle’s security with Yale’s Radio Frequency Identification (RFID) Blocking Box. Large in capacity with dimensions of 170x120x90mm, able to contain 5-7 car keys, mobile phone and wallet, the RFID Blocking Box is designed to prevent keyless vehicle theft through stopping thieves from copying your car key fob information. Specifications: Weight: 0.4 kg Colour: Black Material: Faux Leather Model Number: YRFID-BOX-170. The Yale RFID Blocker Box is perfect for storing car keys and keyless car key fobs. It blocks all signals and can prevent attempts to unlock cars.