Tired of being called by persistent telemarketers? It’s time to fight back with the TeleZapper TZ 900.

TeleZapper TZ 900 reduces telemarketing calls from call-centers that use predictive dialing systems by sending a special tone which tells the computer that your number is permanently disconnected. The call-centers usually erase permanently disconnected numbers from their calling lists after a while. About 90% of call-centers use the predicative dialing system, so the device is effective, reducing significantly the number of telemarketing calls. Unfortunately some pollsters, charities and automated emergency weather systems use the same computerized dialing method, so they’ll get the same disconnected signal. It can also “zap” calls from certain types of calling cards. The TeleZapper TZ 900 connects directly to your phone line, comes with a phone cord and is powered by a long-life lithium battery.

The TeleZapper TZ 900 can be purchased for about US $40.

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