Hosting 1.3 dynamic drivers for full, round sound High range sensitivity: 102dB Full range sound frequency response: 20Hz-20kHz Customize your sound with the JBL app to tweak the onboard EQ Utilize the headphones for hands free calls with the JBL Voice Aware Integrated voice assistant Bluetooth v5.3 for a more reliable, clear and consistent audio transmission Up to 57h of play time and speed charging (up to 2h, 5 mins = 3h)