In-ear headphones with dynamic drivers that were designed in collaboration with the legendary bass player Marcus Miller and feature a real wood housing which helps to produce a warm vacuum tube tone. The housing is made of special type of wood which delivers a rich and amplified mid-bass that is heard smoothly without any unwanted vibrations. This provides natural clear, super enhanced bass sound and sharp high-pitched tones that are produced through four-layered 9mm speakers. For a warm vacuum tube tone, Marcus Miller tuned the frequencies to his preference so you can hear a well-balanced solid mid-bass tone together with a clear resolution that is needed for modern music. The ear caps of the headphones are designed with a dual silicone material which means that each silicone has two different constructions: the inside of the ear cap is stiff, while the outer portion is made with soft silicone. This ensures a secure and comfortable-fitting body for high durability and superior sound quality. The headphones also feature the Sire Custom TPE cable which embodies the warm tube amp sound just like from a tube amplifier. In addition, this cable prevents messy tangles like most conventional earphone cables plus it is lightweight and features excellent durability and portability. The simple and easy to use one-button remote control and built-in microphone allow user to easily play and select songs and make hands-free calling. The headphones come supplied in an exclusive case with one stretch mesh pocket. Frequency range: 20 Hz-20 kHz. Impedance: 32 Ohm. Sensitivity: 105 dB. Max. input power: 30 mW.