EFM Chicago TWS Earbuds - With Advanced Active Noise Cancelling - BlackEFM Chicago TWS Earbuds Black Introducing the EFM Chicago TWS earbuds, crafted for an uncompromised listening experience. These earbuds employ advanced hybrid ANC technology, paired with 10mm dynamic drivers, to deliver crystal clear stereo sound even in noisy surroundings. But hhere is the cool part they are smart too! Integrated infrared sensors automatically mute the earbuds when you take them out, so you will not disrupt those around you. Plus