http://www.anytimeretail.com/mobiles/mo ... -earphone/ Phillips in-ear headphones with gold-plated plug Big bass from a small space. Twin vents balance the high sounds and bass tones. 24k gold-plated plug ensures an ultra reliable connection. Volume control. Frequency response: 12 - 23 500 Hz. Magnet type: Neodymium. Voice coil: CCAW. Impedance: 16 Ohm. Maximum power input: 50 mW. Sensitivity: 105 dB. Speaker diameter: 13.5mm.