Bingoo I850 Stereo HiFi Over-ear Wired Headphones with Dual-Drive, Extra Bass for PC/Tablet/ Computer/Most Smartphone(Black) High precision 40mm diaphragms for deep, powerful bass HIFI strong low bass speaker. Excellent three frequency resolution Noise-cancelling boom mic, built-in high hidden sensitivity microphone, reduces background noise Super soft Over-ear pads that is more comfortable for long time wear Dual folding design folds compact for storage