Jbl Tune 520BT Wireless On-Ear Headphones, With JBL Pure Bass Sound

The
new model delivers up to 57 hours of wireless music playback, a
significant improvement over the previous model’s maximum of
approximately 40 hours. No need to worry about running out of charge
frequently, even when commuting to and from work or school, taking
online classes, or taking long calls.
The
new model also supports a quick charge function that enables 3 hours of
continuous use from a 5-minute charge, so you can use it even in
unexpected situations, such as when you forget to recharge the battery
in time.
This model also supports a
volume limiter function that can be set via the app to prevent the
volume from exceeding 85dB, allowing users to adjust the volume so as
not to strain their hearing even after long periods of use.
Customize to your liking with the new “JBL Headphones” application

The
“JBL Headphones” application, a JBL proprietary application, is newly
compatible with this model. The app offers a variety of settings and
controls, including an equalizer, “Voice Aware” adjustment that lets you
listen to your own voice through the headphones by adjusting the volume
of your voice and your surroundings, “Smart Audio Mode” that lets you
choose the settings that match your content and preferences, and “Auto
Power Off” that lets you turn the headphones on and off automatically.
Various settings and operations are available, such as “Smart Audio
Mode,” which allows you to select settings according to content and
preference, and “Auto Power Off.