RioRand Hands-free Call Center Noise Cancelling Corded Monaural Headset Headphone for Desk Telephone with Crystal Head Brand:RioRand Superior quality sound with the flexible adjustable noise cancellation microphone. Helical headphone cable which will avoid damaging during the use. Comfortable to wear: made of the flexible metal hose with the positioning accuracy MIC + Structural Design + Durable. Hearing protection technology, care of the user's hearing.