Features: The call block device has a 2000 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.   Onetouch blacklist function,  easy to operate even without manual. The phone call blocker is  invention 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: Size: 10 x 9 x 4cm Weight: 85g Package Size: 11 x 10 x 5.5cm/4.3 x 4 x 2.2in Package Weight: 131g/4.6oz Packing List: 1 x Blocker 1 x Connecting Cable 1 x User Manual