ViprLock

Trust is a very fluid concept when it comes to you giving away your house keys. When you need to give your key to a housekeeper, babysitter, or dog watcher while your away, and are uncertain if that person is going out and making a copy of the key, to plot a heist before your return. The ViprLock ensures that something like that could never happen, with its easy key lock changing.The standard ViprLock comes with an A & B key lock, but add-ons are available for up to six different key options. Switching the key setting is as easy as depressing a special button while using key A, and then using key B to unlock the door. The two-key unit is available for $60, with extra key settings for $3 each.

Source: newlaunches.comAdded: 22 May 2008