With its stylish design, these Monoprice earphones will prompt complete strangers to ask you where you got them, but you would not hear a word they say as you rock on down the highway. Made with a noise-isolating design and producing clear and solid sound, these earphone are a great way to enjoy your favorite music from your iPod or other portable music device.They fit comfortably into the ears and produce solid bass notes and clear midrange tones, both normally a weakness in earphones, thanks to the large 14.2 mm driver unit. The package includes three different sized pairs of silicone earbuds, for a better, more comfortable fit.The 48 cord terminates in a gold-plated 3.5 mm stereo plug, which connects to most popular music devices and phones, with better connectivity and corrosion resistance than the more common nickel and tin-plated connectors. The end result is a pair of earphones that are made for the rigors of daily use from the music fan on the go. Amazing sound clarity, hard-rocking bass, and durability.Note - For best results these earphones should be broken in by playing pink noise through them for about 24 hours. The difference in sound quality before and after the pink noise break-in period can be quite dramatic.. Driver Unit - 14.2 mm. Impedance - 32 ohms. Sensitivity - 96 plus or minus 3 dB, 1mW S.P.L at 1 kHz. Frequency Response - 20 Hz to 20 kHz. Rated Power - 3mW. Maximum Power - 10mW. Maximum Voltage - 1.23V. Cord Length - 48in, 1225 mm. Ported - Yes.