https://www.koss.com/headphones/wireless-headphones/porta-pro-wireless
Wireless Bluetooth On-Ear Headphones
Bluetooth 4.1 with apt-X
12+ Hour Battery Life (recharageable)
In-Line Controls (Play/Pause, Start/Stop, Volume, Answer/End, etc.)
Integrated Microphone
Comfort Zone setting on temporal pad
Collapsible design for compact storage
Porta Pro® Hard Case included
没想到竟然会出无线版...
当年也用这只好一阵子，中间修过一次线
后来线又断+开放式会吵到人才换掉