Simply plug it into the 3.5mm headphone jack of your cell phone, flip the switch on the side, and instantly record both sides of a phone conversion crystal clear. The U2 Mobile Recorder’s revolutionary design eliminates the hassle of running audio cables from your phone/ear into a separate voice recording device. Released in 2013, we have been in this market for over 5 years and no other device on the market that even compares to the U2 recorder. The U2’s unique patented design allows it to fit on virtually any mobile phone, even if you have a case on it! The 4GB memory allows for up to 144 hours of audio storage and the rechargeable li-ion battery provides up to 20 hours of recording time on one charge. When you are ready to listen to your recordings, plug in the included headphone or simply plug it into any MAC or Windows computer to instantly view, transfer, & listen. The device is available from Amazon.