Engadget Expand: Noke, A Bluetooth Padlock

If you wanted to let someone else access your padlock, you would typically have to physically hand them a key. Keys get lost, and you don’t necessarily always have the right opportunity to pass off a key to someone. Noke allows you to give someone access with the push of a button on your smartphone. Not only can you pass them access, you can revoke their access, or specify limitations such as times that they have access.