Mini Phone Sentry: Telephone Line Tap Detector The mini telephone line tap detector, has been redesigned for a more covert use. The 15 foot cord and compact design allow it to be discretely placed on your telephone line. It still defeats telephone tapping and telephone taping. Line powered transmitters, line activated tape recording controls and all voltage activated devices will not function. If an extension phone is picked up, the light will go off and your call will be automatically disconnected. Easy to install; no adjustments are necessary. Simply plug the cord from the Mini Phone Sentry into your telephone wall jack, then plug your telephone cord into the Phone Sentry. If the green indicator light is lit, your line is safe. If the green light goes out while you're on the line, this is a clear indication of an eavesdropping attempt, or another phone on your line is off the hook. This item can only be used for standard single line use, will not work with mulitline phone systems and will not work with digital phones. Dimensions: 1 inch x 1 inch x 1/2 inch

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