JBL Bluetooth wireless on-ear headphones SYNCHROS E40BT white E40BTWHT Bluetooth enabled technology for wireless calling and streaming music play. Built in ShareMe technology allows simultaneous, wireless music-listening among 2 ShareMe-equipped headphones Ear-cup-based microphone for hands-free calling JBL signature sound with PureBass performance and premium 40mm drivers delivers full spectrum sound with uninhibited clarity and powerful bass Ergonomic headband and textured, leatherette ear-cushions give an ultra-comfortable fit and effective noise isolation