JBL T450 BT Bluetooth on-ear headphones. Under the hood, a pair of 32 mm drivers punch out seriously powerful bass, reproducing the JBL Pure Bass sound you’ve experienced in concert halls, arenas and recording studios around the world. And since these are flat-folding, lightweight, comfortable and compact. With the convenience of Bluetooth 4.0 technology they’re your everyday companion at work, at home and on the road. For over 60 years, JBL has engineered the precise, impressive sound found in big venues around the world. These headphones reproduce that same JBL sound, punching out bass that’s both deep and powerful. Color: Black.SpecsPlug 3.5 mmDynamic driver 32 mmFrequency response 20 Hz – 20 kHzBluetooth 4.0.