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Crystal is a wireless capsule headphone with ENC technology (Environment Noise Cancelling). Innovative technology reduces unwanted noise during use so that the user can enjoy optimal listening quality. These wireless headphones have a total of four microphones, two per earbud, optimizing the benefits of ENC technology. Crystal headphones also have Low Latency technology, which reduces the delay between sound and video. The playback time of the headphones is 3.5 hours, thanks to the charging case a total of 20 hours.