TANCHJIM Darling BA+DD Hybrid Technology EarphoneFeatures: 1. TANCHJIM has always been honored of sophisticated earphone parts,we adhere to the highest craftsmanship to make a perfect headphone, including fine carving, mirror polishing,thread grinding and other processes. It is precisely because of TANCHJIM's high requirements for craftsmanship that each pair of Darling is a work of art. 2. The sound mouth has two depths of card slots, which can be adjusted according to your wearing habits and your