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You simply write your message (which will be invisible) with the writing end of the Spy Pen. When you want to read the message use the ultraviolet light located on the other end to illuminate the message and it will magically appear. Although this
Will detect some devices used to tap phone line. Alerts you to eavesdropping. Easily connects to any single line phone.
Great for surveillance, police, search and rescue, and those who have difficulty hearing. To protect your ears, very loud sounds are automatically limited. Adjustable volume.
For complete telephone security this device defeats both phone tapping and phone recording- even voice activated recorders. Line powered transmitters and all voltage activated devices will not function. An eavesdropping attempt will disconnect the
This powerful sound amplifier can enable you to hear even a whisper from across the room. Fun for kids but can also be used by seniors to improve their hearing. Adjustable volume. Batteries included.
When using one of the four different voice changer settings, even your closest friends will not be able to recognize your voice. Some settings sound hilarious and are great for practical jokes. This device is universal and will work without an
