Radius Ne structure Dynamic driver Wired type No microphone earphones HP-NEF31 Earphones High-MFD In-ear Cost-effective HP-NEF31S (Silver)

High-MFD structure driver Deep mount earpiece included The diaphragm inside the driver unit is made of an "ultra-multilayer film" that is made by laminating hundreds of layers of polyester resin film. This is more rigid than ordinary PET film, and allows for more brilliant sound reproduction. *We do not accept returns or exchanges for products other than defective products. Thank you for your understanding. [Note] In order to improve the quality of radius products, we inspect them before shipping, update their firmware, and periodically recharge them. Therefore, there may be some products that have been temporarily opened, but they are unused and there is no problem with the quality. Thank you for your understanding.