BlueAnt Pump Air ANC2 In-Ear Headphones (Black)The Pump Air ANC2 sports 10mm dynamic drivers that deliver deep bass and crystal clear highs. Incorporating 4 microphones, for solid ANC and ENC (Environmental Noise Cancelling), the ANC2 ensures great call quality for both sides of the conversation. They also provide lots of volume whether youre working out, commuting, or simply enjoying your favourite tunes. Key Features Active Noise Cancellation with 22dB of ANC 4 microphones ENC Environmental