Caller ID Box for Landline Phone Number LCD Display with Call Blocker - Stop Unwanted Calls, Robocalls, Spam, Telemarketers

• 4,000 unwanted phone numbers Caller ID memory for incoming calls.
• Automatically block unknown and private numbers by turning on the BLOCK NO CID feature.
• Powered by your phoneline. Uses batteries as backup. Requires home-based phone service with Caller ID service. Works with most landlines and VoIP services.
• Simply press the BLOCK button to block an incoming call permanently.