NATURAL AND CRISP SOUND: Finely tuned 40mm driver units and CSR chip give your music the rich sound it deserves. Mpow H7 offers you bettter overall listening experience.( PLEASE NOTE: This item is passive noise isolating, NOT active noise cancellation(ANC), it can't cancel the noise completely but it won't drain the battery and damage the sound.) BUILT TO STAY COMFORTABLE & OVAL EARMUFFS ERGONOMIC DESIGN: Memory-protein ear cushions, adjustable headband and oval earmuffs ergonomic design allow for comfortable all day listening. Getting better hearing enjoyment for travel, work and anywhere in between. IMPORTANT HINT&COMPATIBILITY: Please make sure the driver software of receiving adapter is fully updated when connected to PC or laptop, and you need a SEPARATE BLUETOOTH TRANSMITTER when connected with TV,PS4,Google Pixel 2 XL ect. Compatible with iPhone, iOS, TV, laptop, PC, iPad and other devices.