I own several pairs of earphones, so I don't use these very often. All accessories are included. The ZE2000 is based on the ZE3000 model, which was designed to focus on "sound quality." It deliberately omitted noise-canceling and external sound capture features, and instead, the internal drivers and mechanisms were developed from scratch, redefining "true wireless earphones as audio products where sound quality should be prioritized." This product, the ZE3000, which embodies this philosophy, not only won the "Gold Award" and "Planning Award" at the VGP, the largest audio award in Japan held in 2021, but also received the "Best Buy" award from "Kaden Hihyo," a magazine specializing in home appliances, earning high praise from a wide range of people, not just audio enthusiasts. The "ZE2000" is a model with a different sound quality while still being based on the ZE3000. While the ZE3000 has a natural sound quality with a wide soundstage, allowing you to feel the subtle sounds and resonances hidden within the music, the "ZE2000" brings the vocals and instrument sounds slightly closer to your ears compared to the ZE3000. One of the joys of audio is "comparing sounds." By comparing various models, you can discover the interesting aspects of music you hadn't noticed before and the unique qualities of each product.