I purchased and used this item about 5 years ago. There are writings and markings on the instruction manual. As I received this item from someone else, I will initialize and clean it before shipping. I do not have detailed information, so please research and purchase accordingly. No returns or refunds accepted. If you have any questions, please feel free to ask in the comments section. The following is quoted from the Panasonic HP: Equipped with "Incoming Call Notification LED" on the handset for easy visibility. Equipped with "Harassment Prevention★1" function that plays a warning message to the caller before the ringtone sounds. Displays missed call history (date and time only) even without a Caller ID subscription. ★1 Settings are required. If you are using a Caller ID service, the harassment prevention function will only work when the call is from a number not registered in the main unit's phonebook. #Telephone #Fax #fax #Panasonic #Panasonic