Dynamic Driver Audiophile MMCX Detachable IEMs In-Ear Headphones. Its internal 5um graphene diaphragm, close to 1 Tesla magnet, dual cavity and other acoustic cutting-edge technology enable it to provide high-quality sound performance on the device. Unique Helmholtz resonators, dual cavity bring deeper low frequency dive and flexibility, absorb high frequency standing wave, and make the sound more rounded, rich and plump in the low-frequency. Graphene is composed of carbon atoms, its hardness is 100 times that of steel, ordinary diaphragm needs multiple attenuation of the signal to ensure that the diaphragm itself is not broken, and graphene can better restore the current signal, the distortion is smaller . It is thin and sound conduction speed is very good. iBasso IT01 uses 99.99% multicore star-shape four braids of high-purity copper wire, standard detachable MMCX interface .It can produce condensed and mellow low-frequency and structured high frequency, form a deep sense of space. Specs: Driver: 10.0mm Dynamic driver, Multi layered graphene, which is Ultra-light and stiff, Frequency response: 10Hz-42kHz, Sensitivity: 108+/-2dB, Impedance: 16 Ohm, Noise Attenuation: -26dB, Rated power: 10mW, T.H.D.: <1% (at 1kHz/1mW), Plug size: 3.5 TRS gold plated, Cable length: 1.2m, Connection: MMCX, Weight: 8.0g without cable. Colour: Black.