faraday box key fob protector rfid signal blocking shield two sizes Colour:11.5x9x6cm It can be powered by It can be powered by 6pcs 18650 batteries (not included) for ultra low power consumption or directly through its removable solar panel for continuous charging The mezzanine interior provides extra organization 5 x 9 x 6 cm (small) or 17 x 12 x 9 cm (large) Blocks RFID and relay signals to protect key fobs
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