Line-Control Operation. Support Line-control and most headphone calls with built-in mic. *CLICK doesn't built-in mic* _ Costly Custom Shielded Cable. CLICK utilizes the Special Customized 24AWG Coaxial Cable. 4N Litz OFC oxygen-free copper silver-plated works for shielding layer.6N Litz single crystal copper for its core The coaxial structure can effectively suppress the interference of electromagnetic field to signal. Make sure a more pure and delicate sound. _ CNC Carved Shell. The shell of CLICK is made of aluminum alloy CNC carved process, which Gives a delicate texture. It also plays an excellent role in protecting and shielding the internal decoding & amplifying circuit. _ Inaudible Background Noise. The background noise is as low as 2.5uVrms. The SNR is as high as 120dB (AES17 20kHz, A-weighted)An inaudible background noise for achieving a pure clean melody. _ Technical Specification : Weight : 7.4g Connector : 3.5mm SE THD+N : 0.001% (AES17-20kHz, Z-wt) SNR : 120dB (AES17-20kHz, A-wt) SINAD : 113dB (AES17-20kHz, A-wt) Background Noise : 2.5uV(AES17-20kHz)