Compatible Model: M40X M20X M50 M30 M35 ATH SX1 Interface Size:3.5mm(could add the 6.5mm converters) Cable Length：3m Notice:The spring cable is elongated by 3 meters, not the original length. Package including(as choose) 3.5mm Cable 9.84ft/3m 3.5mm Cable 9.84ft/3m & 6.5mm converters .
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