Review on TRENDnet TC-TP1 Network Signal Testing Probe with Adjustable Volume, Speaker and Compatibility for TC-NT2 by Steven Hudson

It has a few small parts but nowhere to store. The pressure on the device is very, very small. You need good eyesight and lots of light to read them. As others have said, there is no way to test the more common F-connectors like TV and cable. They can be purchased separately. But then again, there is no place to save them. It has been said that 2.5mm headphones can be used from a mobile phone. All my phones use 3.5mm jacks. Therefore, you may need to purchase a separate pair of headphones with a smaller jack. Again, there's no storage space for the headphones, so you'll have to buy a case for all the extra parts. How painful.