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This is the latest version Telephone Call Blocker with hidden or unavailable call numbers can be blocked. And there is no fees to use it Please keep the manual for future use.Block up to 4000 individual phone numbers, including incoming and outgoing calls , prefixes and up to 10 digit area codes.Onetouch to Block Locate a number and then press Block to add it to the blacklist.Better set the call blocker in series one end of it connected to your phone and another end to the PSTN telephone line Though it can also be set up parallel, but not compatible with some phone systems.Permanent storage of the numbers in the blacklist even power is off or telephone line is plugged out.Battery free It is line powered, no need battery. And it works with almost all single line telephones. If you find some numbers are blocked but you never mean to, then press Block and check your blacklist, then delete those numbers which like area codes or prefix numbers. MORE DETAILS asin B00ZTUQXCK bestsellersrank 2 in Telephone Caller ID Displays brand TelPal color CTTC803 customerreviews 3.9 3.9 out of 5 stars 101 3.9 out of 5 stars datefirstavailable December 4, 2015 itemmodelnumber CTTC803 itemweight 0.96 ounces manufacturer Cheeta manufacturerpartnumber CTTC803 materialtype Plastic productdimensions 3.9 x 3.4 x 3.9 inches
