Sandberg Bluetooth Headset ANC FlexMic TrÃ¥dlÃ¸s Headset - Sort The Sandberg Bluetooth Headset ANC FlexMic is an advanced wireless headset that is comfortable to wear for many hours thanks to its elegant over-ear cups. The built-in ANC (Active Noise Cancellation) ensures that you are provided with excellent undisturbed sound, whether you are sitting in a noisy office or exposed to the persistent engine noise of aeroplanes or trains. The detachable, flexible microphone arm gives you the option of optimal voice recording when used for online meetings, gaming and IP telephony. The built-in microphone allows you to discreetly speak into your headset, even when the microphone arm is not attached. The built-in battery is easily and universally charged via USB, and a single charge provides you with 13 hours of operating time.