Westone Audio's Ultra-Thin Balanced Cable is exclusively compatible with Astell & Kern AK100II, AK120II, AK240 audio players and virtually eliminates cross talk with increased audio throughput while maintaining an extremely light weight, flexible, tangle resistant, and high tensile strength dual twist cable. Equipped with MMCX cable connectors, the Ultra-Thin Balanced Cable works with all Westone Audio monitors and earphones. The 2.5mm TRRS connector is specifically designed to support Astell & Kern audio players with a low impedance of 1.5Ω.