Thank you very much for viewing! ^ ^ It's in near-new condition, having been used very little. However, when connected after charging, the right earphone is not producing any sound. There's a possibility that I'm connecting it incorrectly, so I would appreciate it if someone with more knowledge could help. Body weight: Approximately 6.1g Type (headphones/earphones): Canal type Playback frequency band: 20Hz-20000Hz Remote control/Microphone: Microphone compatible Bluetooth support: Bluetooth Version 5.2 Bluetooth compatible codecs: AAC, SBC Bluetooth multi-pairing (headphones/earphones): 8 devices Noise canceling function: Noise canceling compatible Music playback time: Approximately 7 hours (ANC OFF) / Approximately 4.5 hours (ANC ON) Case charging cycles: Approximately 4 times Case charging time: Approximately 1 hour Charging port: USB Type-C Single-ear use (headphones/earphones): Both ears usable Dedicated app (headphones/earphones): Dedicated app compatible Accessories: Charging case, ear tips x 3 sets (L M S), USB Type-C charging cable, quick start guide, safety precautions, warranty and after-sales service guide Thank you in advance. m(_ _)m