Pure Bass Wireless. Introducing Jbl Tune 215BT wireless earbud headphones with Jbl Pure Bass Sound. Thanks to the 16-hour battery life they can wirelessly stream high-quality Jbl Pure Bass sound and provide hands-free call management. Inside the premium housing is a pair of 12.5mm drivers that will punch out some serious bass while the soft ergonomically shaped earbuds ensure the listening experience remains comfortable for long listening hours