While lacking popular attributes such as water resistance or adaptability to sports activities, the JBL Tune 120TWS wireless in-ear headphones bring support for advanced technologies such as voice assistants and on-the-go charging from the included box. Like other rivals in the True Wireless earbuds category, the Tune 120TWS are equipped with a resonator that is inserted into the ear canal, while the outer part of the earbud is slightly larger. It houses a speaker unit with a diameter of 5.8 millimeters with the corresponding amplification, as well as the rest of the electronics, in the form of a Bluetooth adapter