phone call blocker with black list and white list

Specifications

• caller ID box,mini telephone box
• caller ID telephone

• Phone call blocker
  1500tiems of blacklist
  LCD display,call ID recorder
  Block the number by 3 easy way and won't miss the call
• Ajustable Volume Setting
• Incoming Voice Volume Control 
• Adopting the Advanced Microcomputer Controller Design
• FSK/DTMF/ETSI ID Caller Signal Receiving Compatibility
• Character Display, Clear and Beautiful
  
• Three-line LCD Screen Display for Displaying Number,Time and Date Synchronously,and Information is Rich
• 30 Records Incoming Calls Memories
• 10 Records Outgoing Calls Memories
• Automatic Calling Back Function
• Built-line Real Time Clock
• Adjustable LCD Screen
• The Batteries Low Voltage Indication