Function The Headphone Splitter Cable or "Y-Lead" means that you can listen to music & videos from the headphone/3.5mm port on an iPhone/iPod/iPad or any Mac Desktop/ Mac Book product to two sets of headphones or speakers via separate 3.5mm ports. Product Features Twin Foil Shielding to minimise RFI/EMI distortion Precision moulded ABS Casing ensures a comfortable grip when using the cable Flexible PVC cable jacket & strain relief Use to connect all devices with a 3.5mm headphone/audio out connection