I think you can order a plug & wire with it but all you need to do is buy a cheep extention cord and cut the end off. You can order clamps that you use to attach the wires to the heat tape. There are other ways to connect the wires but I've never used flexwatt so I'm not sure which way is best. There might have been a thread on this site that showed exactly how to do it.
If not...click on this link... http://www.arbreptiles.com/cages/flexwire.html
If there is anything the nonconformist hates worse than a conformist, it's another nonconformist who doesn't conform to the prevailing standard of nonconformity.