SHARPER IMAGE SHP51BKGR Universal Premium Foldable Headphones with Mic Compatible with All Devices (Green) The Universal Premium Foldable Headphones by Sharper Image let you listen to music in high definition. The speakers are tuned for deep bass tones and accurate highs, bringing crystal clear sound quality to your ears. Foldable design allows for easy storage of the headphones or listening on the go. The headphones also come with padded earphones and headband, making your listening experience cushy and comfortable. The headphones utilize a single-sided cable complete with an in-line microphone. Never miss a phone call again! The mic also doubles as a button to play/pause music on your phone or MP3 player. The headphones are compatible with all devices, including Android, Galaxy and Amazon phones and tablets, as well as all Apple products. Frequency Range 20-20KHz, Sensitivity 1033dB (at 1K Hz), Impedance 3215% ohm, Unit Driver 40 mm