零售太阳穴传导耳机（双针）
带悬臂式麦克风和耳塞式接收器的 UltraLite 头戴式耳机
这是一个 D 型耳机。
此轻便耳机不用戴在用户耳朵上，就可以让用户接收到音频。
Over-the-Head Headset provides maximum comfort for extended wear with superior audio quality.
Behind-the-Head Headset provides maximum comfort for extended wear with superior audio quality.
