We have a system using a card that has to be held up to a control panel outside the gate, and the cards are reasonably cheap to buy. Each card has to be programmed to work with the system, and can be individually disabled if it gets lost or stolen, and we were supplied with special cards to program and disable the cards, so no expensive call-outs. Unfortunately, the managment company installed a parallel system for remote fobs, installed by a crony company of theirs, without asking the management committee, when teh system we had was working fine. Needless to say, the remote fobs cost an arm and a leg and was intended to provide an ongoing revenue stream. The cavalier attitude of the management company to our money over this and other expenditure prompted us to give them the boot. and we have not bought any more of the fobs once the initial batch ran out. I am amazed to hear, however, that on top of being a total rip-off, these remote fobs are totally insecure. Its a bit awkward having to open the car window to swipe the card, but obviously a price worth paying.