Retell 570 SD is an extended version of Retell 540 SD. It is a modern communication hub for small and medium companies and it offers a huge varied of capabilities. Fast reaction of incoming calls, information about missed calls and suitable recordings for different weekdays - these are only some of its functions. The included memorycard offers 16 hours recording time expandable to up to 64 hours. SD memorycards can be exchanged and can be used for archiving of messages and recordings.