Sony XBA-A2 Hybrid Balanced Armature in-Ear Headphone Headphone parts Model: sealed hybrid. Driver unit: hybrid 3-way (12mm dynamic + 2 x balanced armature). Sensitivity: 108dB/mW. Playback frequency: 4-40,000Hz. Impedance: 32 (1kHz). Maximum input: 100mW. Cord Length: about 1.2m(Silver-coated OFC litz wire, removable). Code Type: Y type. Input Plug: gold-plated L-type stereo mini plug.Weight: about 9g(excluding cable) Microphone part Model: electret condenser. Directional characteristics: omni-directional. Effective frequency band: 20-20,000Hz. Open circuit voltage level (0dB = 1V / Pa): -40dB (0dB = 1V / Pa). Accessories: Hybrid earpiece SS, S, M, L (2 each), silicone foam earpiece, S, M, L (2 each). ,Clip, carrying case, cord length adjuster.