Built-in low power consumption chip, up to 32h play time with the charging case 4-mic ENC calling noise cancellation, filtering out noise for HD calling experience BT 5.3, low power consumption stable transmission, audio and picture sync-up without delay 13mm graphene diaphragm, HiFi super bass quality Ergonomic half in-ear design, ensuring long-lasting comfort to your ears IPX4 water resistance, withstands rain and sweat Seamless switch between single and double earphones, instant connection once opening the case