The Newest Eavesdropping Gadget for PIs and Spies - Also a Security & Safety Tool

When people around you put on headphones or earbuds you begin to speak freely. Big mistake. You may have been lulled into a false sense of security by an eavesdropper using The Fuser. 
"The Fuser increases your awareness of the natural sounds around you using its built-in microphone to “mix” the music in your headphones with the outside world, allowing you to enjoy your music while still hearing yourself and others around you talk, laugh, work, play.*
 
Listen to music at work and still engage with co-workers. Take a road trip and not ignore others in the car. Relax at the beach with your music and still hear the waves crash… The possibilities are endless. (Oh, and by the way) *Fuser can also be used without a music device as a powerful hearing aid." (more)

P.S. This is also an excellent safety device for when you are walking, jogging, bicycling, or in any other situation where you need to be alert to your surroundings.