JBL Tune 730 BT HeadsetJBL Tune 730 BT Headset JBL Pure Bass Sound adds depth, power, and punch to everything you hear. Custom 40mm drivers deliver rich, dynamic audiowhether youre gearing up for the day, kicking back, or getting lost in the music. Customize your sound with the JBL Headphones App 2 beamforming mics for perfect calls Make the sound your own with EQ presets. Default for balanced listening, Bass for extra low end punch, or Vocal to bring voices to the front.