This is an earphone jack for 2.5mm 4-pole plugs. I purchased it from e-earphone, but I'm selling it because I no longer plan to make a conversion cable. Therefore, although it is new, please understand that it has been handled by a person once, and that there may be some variations due to the product specifications before purchasing. 【High-Quality Sound】 NOBUNAGA Labs' earphone jack adapter uses gold-plated materials, providing clear sound without compromising sound quality. 【Compact Design】 The small and lightweight design is convenient to carry and can be easily connected to smartphones and tablets. 【Compatibility】 It is compatible with many devices and can be used with various audio equipment. - Brand: NOBUNAGA Labs - Model Name: NLP-PRO-TPFEN - Price: ¥1320 - Material: Gold-plated - Color: Black - Type: Earphone Jack Adapter Thank you for viewing.