This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A pair of headphones.

n. A pair of headphones with a voice transmitter attached.

n. A pair of headphones or earphones, or a singular headphone or earphone, typically with an attached microphone.

n. On a bicycle, the system of bearings that connects the fork to the frame.

n. receiver consisting of a pair of headphones

"Left: This headset is for communicating with others during rehearsal."

telephone receiver    receiver   

headphone    headsets    Bluetooth    earphone    earpiece    microphone    stereo-    handset    loudspeaker    intercom