Thank you for viewing. This is the SwitchBot Smart Video Doorbell. I purchased it to replace a Panasonic doorphone and used it for about a week. The camera quality was overwhelmingly good, but my family members were confused by the different operation, so I decided to revert to the original system. Therefore, I am selling this as it is no longer needed. Thank you. An intercom that can be linked with a smartphone. - Brand: SwitchBot - Model Name: Smart Video Doorbell - Memory Card Slot: microSD card compatible - Power Source: AC adapter - Operation Buttons: Call, End Call buttons available