Stop Telemarketers Turn your Voicemail or Answering machine into a Telemarketer Blocking device. ***Does not affect the ability to leave a message. Works great with cell phone voicemail. CD contains Special blocking tone and 4 prerecorded messages in mp3 format. When a telemarketer calls & their equipment hears the tone it hangs up & kicks your number out of their database. ***Before you know it no more harassing calls!*** If you have a certain message you would like to have on the cd please email it to me after you place your order and I will include your custom message at no additional charge.