VEVOR Faraday Box Signal Blocking Holder for 5~8 Car Keys Key Safe Protector, Car Key Signal Blocking Box Box for Car Security VEVOR Faraday Box Signal Blocking Holder for 5~8 Car Keys Key Safe Protector, Car Key Signal Blocking Box Box for Car SecurityMulti-function Signal Shielding BoxProtect Your CarMulti-layer BlockingLarge CapacityVersatile UseSimple to UseKey Capacity: 5-8 Car Keys,Capacity: 0.07 cu.ft,Shielding Distance: 40 cm,Color: Black,Material: PU + Density Board + Nickel-copper RFID,Model Number: LY-07,Product Dimensions: 6.3 5.1 3.1 in / 160 130 93 mm,Net Weight: 0.83 lbs / 0.38 kg,Signal Shielding: WiFi (2.4 5GHz), Bluetooth, Phone Signals, 5G Networks, GPS, RFID, and All Device SignalsSpecifications:- Length: 17.6 in, Width: 14.5 in, Height: 12.0 in (description exceeds maximum possible length)