The Plantronic BackBeat Pro 2's Active Noise Cancelling (ANC) technology can put a serious kibosh on an otherwise noisy situation. The headphones lacked the annoying white hiss that a lot of competing headsets use to keep the outside world at bay. If that's not enough, the cans also offer a whopping 24 hours of quiet coupled with warm, rich audio and easy-to-use integrated smart controls.