HQRP Telephone Call Blocker for Blocks All Nuisance Phone Calls, Stop All Junk Calls Plus HQRP Coaster HQRP&reg; Phone Call Blocker plus HQRP&reg; Coaster; The Call Blocker is easy to install and simple in use. Large 5"x3" LCD display with blue backlight and 4 levels of brightness is easy to read. The Visual incoming call alert LED light is bright and well-identified. AC Power Supply, Batteries and RJ11 Patch Cord are included in the offer. This kit ensures the smooth operation of the Blocker: when it is not powered up by the AC adapter, you can switch it to batteries. Please pay attention that the AC adapter doesn't charge the batteries in the device. The device stores phone numbers in non-volatile memory that retains stored data if loses power. You can have access to the list of up to 100 most recent incoming and 50 most recent outgoing calls. It blocks up to 1,000 unwanted phone numbers, up to 5 area codes or prefixes (1-5 digits), calls showing as OUT OF AREA (--- O ---) or PRIVATE (--- P ---) or calls with no phone number displayed. Tilt base / Desktop or wall mountable. FSK / DTMF dual system. 200 days warranty!