1-channel multifunctional code lock. No more annoying key jingling This code lock serves as a useful access control system for your home, rooms, etc. You no longer need a lost key to get into your home. All you have to do is enter one of your selected passwords to gain access to your home. Additional 10 codes for visitors or workers In addition to the 100 possible codes that you can programme, you also have the option of storing a further 10 codes for visitors or workers, for example. These codes either expire after a single entry or can be time-controlled. (0-99 hours duration).