The phone call blocker is the greatest in to enhance the of your home phones. Say goodbye to all annoying voice-mails. | With just 6 buttons on the blocker and clear LCD s n, friendly for older people as well. A great choice for Christmas gift. | The call block device has a 2000 number blocking acity. ly keeping your phone quite without annoying call. | One-touch blacklist function, er easy to operate even without manual. | 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 exchitche.