GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. "TeleSentry" Phone, Fax Computer Security OUR PRICE: $ 12.95 NEW: "TeleSentry" Telephone Wire-Tap Detector Afraid someone might be monitoring your private calls. TeleSentry tap detector tells you if someone is listening. A green light goes out if another phone extension is lifted or a recording or listening device is detected. TeleSentry also automatically disconects other extensions, including answering machines. Ideal for home or office where your private calls must remain private. By-Pass Push Button: The push button is installed on top of your TeleSentry unit. When someone is tapping your phone or eavesdropping from another extension during your phone conversation, the indicator light will go off. Then you can push and hold the by-pass button to continue your phone conversation, this time with caution. Computer Modem Router Protection: When any computer modem and router is installed with TeleSentry, the data transfer of your modem router is secured. In addition, all extensions with TeleSentry are cut off when modem is in use. Credit Card Checker: Two or more credit card checkers can share a phone line without interference. When one checker is in use (normally 30 sec), other checkers can not interfere with the process. Other checker can be used only when indicator is lighted. TeleSentry Complies with FCC, Part 68, REN IS O.O.B. FCC REG # FZJ4ON-72444-KX-E USOC # RJ11C GVO Marine Electronics: