JBL OPENSOUND TECHNOLOGY HI-RES AUDIO WIRELESS WITH ADAPTIVE BASS BOOST 4-MIC CRISP CLEAR CALLS 2.0 WITH AI-TRAINED ALGORITHM CUSTOMIZABLE THROUGH THE JBL HEADPHONES APP UP TO 38 HOURS TOTAL PLAYTIME DUAL CONNECT AND SYNC WITH FAST PAIR BLUETOOTH 6.0 SENSITIVITY: 92 DB SPL@1 KHZ