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Review Summary
2020-03-25T20:00:00
sounds good but horrible quality swivel broke after 2 years of almost no use
liviu223112

2019-02-21T19:00:00
broke at the hinge. this also happened to another pair I bought only giving one star just because this is an easy fix that jbl could have easily fixed
zelf

2018-12-24T19:00:00
Sound quality is amazing, I never had a problem with it. battery always lasted me weeks with heavy usage at work. heavy duty builds, lasting 3 years in construction sites.
RubbenHub

2018-09-21T20:00:00
The sound quality isn't great, bass sucks, they fell off my desk while working and they sound so bad now like cheap headphones definitely don't recommend you waste your money
Spencer19

2018-08-08T20:00:00
Jobless e40bt is a beautiful pair of headphones because the Cristal sound makes them perfect for music and tv
Carletto166

The JBL Synchros E40BT Black On-Ear Bluetooth Wireless Stereo Headphones features JBL's legendary sound, Bluetooth connectivity with ShareMe music sharing, all in a stylish, contemporary design. Large 40mm drivers with PureBass performance envelop your ears, delivering an expansive soundstage with clarity and precision.
Bluetooth technology allows wireless connectivity with your smart devices, with single-button access access to hands-free, clear calling thanks to JBL echo-cancellation technology. Integrated ShareMe lets you take your music social, allowing you to stream music wirelessly to another ShareMe-equipped headphone. And a built-in rechargeable Li-ion battery keeps the sound going with 16 hours of uninterrupted play time. The ergonomic headband and 3-D hinges provide for long lasting comfort. Soft, leatherette ear cups cradle your ears for all-day comfort while providing a heightened level of passive noise reduction.
Bluetooth enabled technology
The E40BT is a stylish, wireless headphone that is the perfect complement to a smart device or tablet. It's also a social hub: activate ShareMe with the touch of the ear cup and stream your music to another ShareMe enabled headphone.
Built-in, USB rechargeable lithium-ion battery
Listen all day, charge at night. The built-in rechargeable Li-ion battery powers the E40 for a generous, best-in-class 16-hours of play time. And on the occasion that you find yourself without power, use the included 3.5mm aux cable to play passively. Also included, a micro USB cord for recharging.
Ear-cup-based microphone with echo-cancelation technology
The E40BT keeps you connected, not tied down. Seamlessly shift from music listening to a phone call at the touch of a button. Speak wirelessly via the built-in microphone and experience clarity thanks to JBL echo-cancelation technology.
JBL signature sound with PureBass performance and premium 40mm drivers
The E40BT delivers uncompromising highs and expansive lows; performing at a high level, is reproduces a wide frequency response from 10hz to 24khz. The large drivers combine with JBL's PureBass performance to assure a dynamic, undistorted listening experience - Hear the Truth.
Ergonomic headband and textured, leatherette ear-cushions
The lightweight, ergonomically designed headband with soft, leatherette ear cushions cradle your ears for all-day listening comfort, while shutting out noise from the outside world. 3D, aluminum swivel hinges align the ear pad for the perfect fit and ultimate wearability.