I used it for one day. Please refrain from purchasing if you are concerned. - Initialized. - Body wiped clean. - Used ear tips washed and disinfected with alcohol. There are no accessories such as instructions, case, or charging cord. Please check the condition in the images. About the specifications [The power of Hi-Res sound sources] By adopting a titanium composite diaphragm and covering a wide playback frequency band from 20Hz to 40kHz, it reproduces the original sound from low to high frequencies. [Equipped with the industry's highest quality high-quality audio codec "LDAC"] To pursue the beauty of music, we have adopted the high-quality audio codec "LDAC" with high standards. A transmission bandwidth of up to 990kbps clearly reproduces even the finest details of high-resolution sound sources. [AI call noise canceling] Equipped with AI call noise canceling technology, it effectively removes surrounding noise. Clear and stress-free calls are possible even in noisy places or while traveling. You can clearly hear the other person's voice and enjoy a comfortable calling experience. [Enjoy music to the fullest with up to 18 hours of playback] You don't have to worry about running out of battery even after long hours of use, and you can enjoy up to 18 hours of music playback on a single charge. It's a companion for your ears that you can enjoy with peace of mind, even during busy daily life or long trips. [80ms ultra-low latency game mode] Equipped with a game mode, the realistic sound from your ears brings even more immersion to your gameplay. With an ultra-low latency connection of just 80ms, the game's action and sound are synchronized in real time.