Hot news and information - the padlock Bluetooth padlock without key mobile control

This big padlock form has been for decades, but in this era of smart things, someone give it with bluetooth and smart chip. This kind of change as a result, you never need the key, as long as have a cell phone can unlock. And, this way is more easy to share -- — Who don't have the key to, as long as the phone on a share, your friends can also open the lock. It will track all activities, such as lock, unlock, warned that there are logging.