BWOO HF15 STEREO HEADPHONES Double Moving Coil design, which allows you to channel the sound and make it clearer and more intense, and deep bass Type of earphones In Ear Connector Jack 3.5 mm External cone diameter 10 mm Sensitivity 103 dB + 5 Impedance 32 Ohm Double Moving Coil Built-in microphone Length 120cm Material TPE + ABS