Features:The call block device has a 1500 number blocking capacity. Completely keeping your phone quite without annoying call.The phone number blocker can block international area codes, it's useful for those international aggravating calls that deceptively adopt your area code and any exchange.  One-touch blacklist function, super easy to operate even without manual.The phone call blocker is theinvention to enhance the privacy of your home phones. Say goodbye to all annoying voice-mails.With just 6 buttons on the blocker and clear LCD screen, friendly for older people as well. A great choice for Christmas gift.Specification:Black List Capacity: 1500 GroupSize: 9.5 x 6 x 9cmPackage Size: 10 x 9 x 6cm/4 x 3.5 x 1.2inPackage Weight: 116g/4.1ozPacking List:1 x Blocker1 x Connecting Cable1 x User Manual