Today we are testing wireless headphones from JBL in a trendy white color, simple and stylish. Only the icon on the inconspicuous button notifies about the possibility of connecting to iPhone by Bluetooth. Despite the fact that the E50BT looks quite massive, they weigh a little. And that's good – the headphones can be worn for hours without discomfort … The design of the E50T is such that they completely cover the ears. Inside, the speakers are finished in soft faux leather. There are a pair of hinges to regulate the pressure of the cups to the head. They are also used to fold the headphones. On the left cup is a hidden four-way key, which is responsible for adjusting the volume and answering phone calls. At the end there is a connector for connecting a mini-jack cable. There is also a small button that activates Bluetooth – the module. Headphones can be used not only for listening to music, but also for talking on the phone. Thanks to the 50mm drivers, the E50BT has very good sound and good bass. No kinks up or down, everything is reproduced neatly, without emotion. The volume is quite enough. The sound quality of the headphones surpasses everything that can be squeezed out of the MP3 format. But for listening to jazz or classical music from a good source, it is too simple. As indicated in the technical specifications, the E50BT can operate for up to 18 hours on a single charge. This is so, for a few days of using them, the charge dropped by only 20 percent. Specifications JBL Synchros E50BT: Bluetooth 3.0 (2.402-2.480 Hz); sound emitters – dynamic, 50 mm; the range of reproducible frequencies is 20–20,000 Hz; impedance – 32 Ohm; sound pressure – 117 dB at 30 mW; microphone sensitivity – –42 dB; battery life – 18 hours weight – 300 g JBL Synchros The E50BT is an excellent youth headphone that fits comfortably on the road and reproduces music of any genre well.