Four driver hybrid in-ear monitor. Features three balanced armature drivers and one superb dynamic driver. Light custom shape, multi-dimensional adaptive optimization, brings an excellent sense of wearing. Unique carbon fiber panels, hand-polished, coated, integrated seamless design. Using the patented structure of the self-developed audio channel, combined with a strong magnetic field double-cavity graphene dynamic driver, and three knowles balanced armature, create an astounding sound of full enthusiasm and clarity without loss of density, covering all types of music. 10 mm strong magnetic field double cavity graphene dynamic driver. The dynamic driver adopts the coaxial structure, and the divide frequency points of the precise calculations are perfectly integrated with the balanced armature driver. The smooth connection can form a more rounded, large scale and high-quality low frequency and atmosphere. All blend into one harmonious whole, as if it was made by nature. Single-crystal copper and copper-silver alloy wires mixed woven, redesigned connectors, new welding methods, make the sound performance even better, and make the high-resolution and large-scale dynamic range performance of IT04 better. Frequency range: 5 Hz-40 kHz. Sensitivity: 110+/-2 dB. Impedance: 16 Ohm. Passive noise reduction: -30 dB. Rated power: 10 mW. Distortion: <1% THD(@1 kHz/1 mW). Cable length: 120 mm. Plug: 2,5 mm gold-plated plug. Package included: iBasso IT04, 2,5 mm to 3,5 mm adapter cable, case. Weight: 13 g. Colour: Silver