This is an old unit that they would install on your refrigerator back in the day. They would plug this in to the wall and lock your refrigerator plug inside of this. You would have to put a quarter in every day or the timer would run out, the refrigerator would shut off, and your food would spoil. Once it was paid for, they would remove this unit. Kind of like a rent to own system. The idea caught on and places started using them for other electronics as well, but the original purpose ...of these was for GM Frigidaire freezers and refrigerators. Very interesting piece of history. I do not have a key unfortunately. See pics for details. Feel free to ask questions. Be sure to check out my other listings! Policies: PAYMENT: Payment is due within 7 days of auction close. SHIPPING: Shipping price shown is for the USA lower 48. All other locations may cost extra. Please note that I have up to a 3 BUSINESS day handling time. ISSUES: If you are not completely satisfied with your purchase, please contact me before leaving feedback so that we can reach a resolution. Thanks for looking!!!