This item was purchased from a reseller, so the period of use is unknown, but it is in very beautiful condition. Alcohol disinfection has been performed. I have confirmed that it can be paired with a smartphone. ************************************************ This model has enhanced features such as support for high-resolution and lossless codecs compatible with high-quality streaming services, and LE Audio, which allows content sharing. Acoustic design by the Hi-Fi earphone brand Acoustune ANIMA's fully wireless earphones, ANW02, are designed and developed by Acoustune, its parent company. TWS has become a very close item in daily life. Especially in streaming services and digital sales of sound sources, high-resolution and lossless distribution is becoming common, and not only basic performance but also sound quality is required more than ever. In this context, the sound of ANW02 aims for "the sound the artist intended in the studio" by playing high-resolution quality and high-quality codecs. The design and development of the diaphragm is carried out using the same methods as dynamic drivers used in sound quality-focused wired earphones, and optimization is achieved through approaches that are not possible with wired earphones by using DSP, realizing the target sound quality.