I used this gadget in my Response Point presentation last weekend at SMB Summit in Dallas. It's made/sold by Radio Shack and only costs $25. It's sold as something that would let you record your cell phone conversations to a voice recorder. The only little thing extra you need to know or have is a gender changer (the audio connector kind ) for F-F 1/8" adapter. Instead of connecting it to a voice recorder I connected it to the input of the hall's PA system. I was then able to use my cell phone to call in live to a Response Point system - in this case one back in my office in Cincinnati. This enabled me to let the audience 'listen in' on the caller's experiece with Response Point. This worked great and I think it helped those in attendance see how the voice recognition works. I almost wound up in the dog house later when I took a live phone call from my wife during the presentation - using this gadget.