An electronic lock is an overlay on an existing door lock that has its own battery power and usually does not require internet access. Installation is extremely simple and takes about an hour. The Hospert system in combination with electronic locks works like an automatic reception desk. Access codes are generated automatically after confirming the reservation and sent via SMS to the indicated telephone number. The codes are unique, they contain information about the date and time, so you can be sure that the same code will never repeat itself. You can also assign temporary or permanent codes to your employees or service providers.