Swivel Earcup Design / 40mm Driver / Bluetooth 3.0 Compatible / Built-in Mic with Echo-cancellation / USB Rechargeable Battery / User Controls on Earcup
It was only a matter of time before JBL engineers decided to infuse best in class Sound with the wireless convenience of Bluetooth technology. Introducing the JB56BT, this is a wireless Headphone with all of the freedom and flexibility that comes from cutting the cord. With their swivel-style pivoting earcups and advanced 40mm Drivers dishing out signature JBL PureBass performance, the JB56BT speaks volumes when it comes to sound. But that's only half the fun. Using the simple User Interface on the outer earcup, not only can you play, pause, and control Music volume precisely, but you can instantly turn your Headphones into an advanced Bluetooth 3.0 wireless Headset for both incoming and outgoing calls. In the fast and furious pace of today's world, why would you settle for anything less than both?
In the Box: 1 pair of JBL J56BT with rechargeable battery, 1 USB-rechargeable battery, 1 accessory Audio cable, carry case, Quick start guide

Features
Swivel earcup design with Bluetooth 3.0 wireless freedom and Connectivity - The J56BT comes complete with in-built Bluetooth 3.0 connectivity, giving you the freedom of wireless connection while saving on battery power. They're stylishly flexible too - with close-back, pivoting earcups that give you freedom, flexibility, and value - All in One package.
Simple user controls on outer earcup; USB-rechargeable battery - Listening to music on the go means having a headphone that's easy to use. That's why the J56BT feature simple volume controls on their outer earcup, allowing for seamless, hassle-free functionality. With their USB-rechargeable battery supplying up to 12 hours of power, you can get from point A to B without any worry of the music ever stopping.
40 mm driver delivers signature JBL PureBass performance - Scientifically designed earcup acoustics and premium 40mm drivers are at the heart of JBL PureBass performance, bringing you all the raw power and clarity of pulsing bass - the kind you'd expect from the world leader in concert sound. The result speaks for itself: JBL clarity of sound no matter the frequency or volume, letting you enjoy the deepest-hitting drums without sacrificing even a hint of sound quality.
Built-in Microphone with echo-cancellation for natural sounding calls - Part of being flexible means being ready for any occasion. With its built-in microphone that offers signature echo-cancellation technology, your J56BT gives you the same, best-in-class sound quality in your conversations as it does in your music listening.

Specifications
Type: Bluetooth wireless on-ear Stereo headphones
Driver: Advanced 40mm drivers
Microphone Sensitivity: -42dBV/Pa @ 1KHz
Frequency Response: 20-20KHz
Maximum SPL: 115dB @ 30mW
BT Frequency Range: 2401-2480MHz
BT Transmitter Power: < 4dBm
BT Transmitter Modulation: GFSK, 8DPSK, PI/4 DQPSK
Battery Charge Time: 2 hrs
Music Playing Time: 12 hrs