It's a model from about 3 years ago, but I only use it occasionally and it works without any problems. It's water-resistant, has noise-canceling, and a built-in microphone, so I think it can be used in the city or for working from home. The original box, instruction manual, and spare ear tips are included. ------------------------------------------- ・This product is certified with the Technical Regulations Conformity Mark (Frequency band: 2.4GHz band) for enhanced communication. ・Beamforming technology for clear calls ・Thorough attention to sound quality. High-quality design with a φ5.8mm driver that reproduces the world of music ・Active noise-canceling function to focus on the sound ・Quick hear-through function to check the surrounding sounds ・About 15 minutes of charging allows for about 100 minutes of continuous playback #audio-technica #wireless #bluetooth #canal