Glue Drip Shape Closure Process:The zero cavity structure adopts sandwich structure on (front cavity, decorative plate and glue drop cover), Zero is covered by glue drop process and is solidified and shaped by ultraviolet and processed by hand polishing and paint spraying, which ensures a beautiful design while reinforcing the strength caused by the dropwise application of glue to cover . EXCELLENT LENS INDICATORS Zero has adequate low frequency gain and high frequency response in line with HRTF characteristics, making ZERO lens index comparable to that of professional monitor headphones, while not as cold and rigid as that of conventional monitor headphones, and its timbre is natural and full of atmosphere. Excellent Objective Indicators Zero has suitable low frequency gain and high frequency response in line with the HRTF characteristics, making the zero owner of the lens index comparable to that of professional monitor headphones, while not as cold and rigid as that of ordinary headphones, and its timbre is natural and full of atmosphere. HIGH QUALITY CABLE FLEXIBLE EXPANDABILITY Four strands of high quality silver plated cable, combined with the universal 0.78-2 pin interface (the cavity is a recessed 0.78-2 pin socket), achieve excellent sound quality and expand the possibilities by changing wires. › See more product details; Product description Specifications: Configuration: 10mm+7.8mm Dynamic membrane material. Material: Polyurethane + LCP composite membrane THD: THD at 1kHz1% Sensitivity: 117.5dB/Vrms (at 1kHz) Impedance: 10Ω 15% (@1kHz) Frequency response: 20Hz-39500Hz (IEC61099) 4, free field d) Cable: silver-plated, oxygen-free; Product description Specifications: Configuration: 10mm+7.8mm Dynamic membrane material. Material: Polyurethane + LCP composite membrane THD: THD at 1kHz1% Sensitivity: 117.5dB/Vrms (at 1kHz) Impedance: 10Ω 15% (@1kHz) Frequency response: 20Hz-39500Hz (IEC61099) 4, free field d) Cable: silver-plated, oxygen-free; Specifications: Configuration: 10mm+7.8mm Dynamic membrane material. Material: Polyurethane + LCP composite membrane THD: THD at 1kHz1% Sensitivity: 117.5dB/Vrms (at 1kHz) Impedance: 10Ω 15% (@1kHz) Frequency response: 20Hz-39500Hz (IEC61099) 4, free field d) Cable: silver-plated, oxygen-free Model: ZERO Size: Color: Blue