Template:Stub ATH-WS660BT is a real-life wireless headset designed and manufactured by Audio-Technica Corporation. The headset in the 5Toubun no Hanayome series is identically modelled after its real-life counterpart. It is used by Miku Nakano, and is a replacement to her other similiarly branded headset which stopped functioning due to the event in the end of Seven Goodbyes Arc.[1]
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