Thank you for viewing. Purchased in January 2022. Around 2024, the right-side battery experienced rapid discharge, and I stopped using it after that. I considered repairing it, but the cost was high, so I decided to put it up for sale. I will try to accommodate price negotiations as much as possible. ■ Product Description ・Contents: Earphone body (without ear tips) / Charging case ・Condition: Oil-based ballpoint pen stain on the bottom of the charging case / Slight yellowing at the joints of the main body (cannot be clearly confirmed in the photos.) ・Operation: Both ears confirmed / The right side discharges very quickly (normal use is possible with only the left side) / Wired and wireless charging are both possible without problems. ・Shipping: I am considering wrapping the entire item in cushioning material and shipping it in a padded envelope. Below is an excerpt from the official description. Power supply: Li-ion Charging time: Approximately 1.5 hours Charging method: USB charging (using the case), wireless charging (using the case) ■ Bluetooth Communication method: Bluetooth standard Ver.5.2 Output Bluetooth standard: Power Class 1 Maximum communication distance: 10m Operating frequency band: 2.4GHz band (2.4000GHz-2.4835GHz) Supported Bluetooth profiles: A2DP, AVRCP, HFP, HSP Supported codecs: SBC, AAC, LDAC Supported content protection: SCMS-T Transmission band (A2DP): 20Hz-20,000Hz (44.1kHz sampling) 20Hz-40,000Hz (LDAC 96kHz sampling 990kbps) Other features: Noise canceling