The i Recorder for iPhone 4/4s/5 is the ultimate retro speaker system for you music. Its retro design & fully functioning buttons are reminiscent of the classic cassette players of the 70's through to the 80's & up until the 90's when this format gave way to CD's. To use this novelty speaker just plug in your iPhone into the 3.5mm jack provided, pop your device into the cassette compartment & press play to listen to classic songs by Queen or Michael Jackson or whatever is on your iPhone. You can alter the volume, stop your tracks & even fast forward & rewind your music using the fully functioning buttons on your i Recorder. If it ever runs out of battery you can either replace the batteries or power it using a micro-usb cable (not provided). For ultimate portability the i Recorder comes with a pull out handle to carry it with you wherever you go.