The premium KSE1500 Electrostatic Earphone System is an electrostatic earphone and amplifier system with digital-to-analog-conversion (DAC) for use in-line with portable media players. Featuring single-driver electrostatic Sound Isolating earphones matched to a USB digital-to-analog-converter (DAC) that converts analog or digital audio from portable digital or analog audio sources. The KSE1500 system features a 24 bit/ 96 kHz conversion rate, customizable 4-band parametric EQ with five standard and 4 user-defined settings, recharge ability and input level meters. Able to process both digital audio directly via micro-USB, analog via a direct line in, or bypass entirely for a pure analog signal without conversion. The KSE1500 system defines a new standard of portable listening that brings high-fidelity audio into the mobile demands of today’s active lifestyles. Included: KSE1500 Electrostatic Earphone System, USB wall charger, Micro-B-to-Lightning cable, Micro-B OTG Cable, (2) 1/8" (3.5mm) cables [6" (15.2 cm) and 36" (92 cm)], ¼" (6.3mm) adapter, leather carrying case, airline adapter, attenuator, cable clip, (2) security bands, microfiber cleaning cloth.