Driver unit: 10mm diameter Impedance: 16 ohms Frequency response: 17hz to 21khz Sensitivity: 113 ¡à3db (at 1khz) Maximum input power: 50mw Plug type: 3.5mm stereo Cord length: 1.2m Oem order welcomed With perfect sound effect Buyer design the packages, the weight and dimensions is up to the design