This key fob works with most BPT proximity readers using the IXP20 and IXP220 systems. It is part of the award winning Impro access control range. The keyring style makes it simple to carry for the key holder and it is a cost effective solution for areas where photo identification is not required. It also features a lifetime guarantee against electronic failure. Door entry fobs have become a very handy form of proximity access and the door fob is here to stay.