Each pair of LSTN Bowerys is individually handcrafted from real, reclaimed wood. No two pairs are the same and wood grain might vary from photos. For every pair sold, LSTN helps restore hearing to a person in need through Starkey Hearing Foundation. Buy headphones, give hearing. - Reclaimed cherry wood housing - Microphone for calls and voice recording - Passive noise isolation - Durable cable wrapped in nylon - Works with iPhone, iPod, Android, Blackberry, CD, DVD - 3 pairs silicon ear tips - S/M/L - Drawstring carrying case to protect from scratches - Drive unit: Moving coil dynamic speaker - Speaker size: 8mm - Magnet: Neodymium - Sensitivity: 101+/-3dB At 1KHz1mW - Frequency response: 20Hz-20KHz - R&L balance< 3dB(20Hz-10KHz 1mW) - THD, total harmonic distortion: <5%(20Hz-20KHz input126mV) - Impedance: 16 Ohm - Rated input power: 3mW - Cable: length 1.2m - Plug: gold plated 3.5mm"