Experience superb sound quality with these light weight and extremely portable headphones with built-in mic. 30mm Dynamic Driver UnitOn-Ear HeadbandIn-line Remote control with micFour-conductor gold-plated L-shaped stereo mini plugDriver Unit 30mm DynamicSensitivity 98 dB/mWImpedance 24 ΩFrequency Response 10 - 24，000HzCord 1.2m cord (both sides) with In-line Remote and MicPlug Four-conductor gold-plated L-shaped stereo mini plugWeight (without Cord)