EP0509B Features Superb stereo sound effect for music play Equipped with a microphone for hands-free calling Soft ear cushions will offer you a comfortable fit Universal 3.5mm plug has a wide application Convenient 1.2 m cable General Specs Brand & Model VYKON MQ55 Type On-ear headphones Plug 3.5 mm Volume Control N/A Microphone Yes Cable Length 1.2 m Compatibility Cell phones and PCs equipped with a 3.5mm audio interface Earphones Sound Bass stereo sound Speaker Size 40 mm Frequency Response 20Hz-20KHz Impedance  32 Ω Sensitivity 102 ± 3 dB Microphone Unit 6 x 5 mm Frequency Response 30Hz-16KHz Sensitivity -58 ± 2 dB Operating Voltage 3V Package Details Weight: 467.59 g Size: 22.9*19.3*9.2 cm