1、Filter Design: 3 types of tuners are equipped with different filters to change the pressure in the ear canal through breathability to make a completely different sound. 2、Tuner Design: The magnetic force of the tuner makes the dynamic driver, getting a double magnetic force to enhance the lateral sound level of the headphones. 3、Bass Mode: Wired monitor earbuds bass mode is suitable for warmer music, such as electronic music, dance, DJ, symphony, lyrical oldies, drums as nodes, etc. 4、Normal Mode: Normal mode is neutral, warm and balanced for ACG. it performs well in most music. the Trebble mode is good for listening to cooler songs such as fresh songs and Japanese songs. 5、Driver Design: 13mm dual chamber dynamic driver can effectively control the air pressure and increase the amplitude of the diaphragm to increase the tel longitudinal, sound level by more than 50%. Item Type: Wired Monitor Earbuds Material: PVC, Metal, PU Horn Diameter: Approx. 13mm/0.5in Wire Length: Approx. 1.2m/3.9ft Impedance: 46 Ω Sensitivity: 110 dB Frequency Response Range: 7-40KHz Pin Type: 0.78mm-2 Pin Configuration: 13mm Dual Chamber Moving Coil Speaker 2 x Headphones 1 x 4 Strands of Single Crystal Copper Silver Plated Mixed Braid Wire 12 x Silicone Ear Hats(4 Pairs Each for S M L) 1 x Tuner Storage Nameplate 1 x Magnetic Tuning Rod 1 x Leather Storage Box 1 x Manual 1 x Cleaning Brush