The M10 plus earphones are a game changer. The premium quality earphones come with a stylish design with Hifi-stereo sound, with noise isolation technology, and also have a precision bass for an unparalleled listening experience. Grab your M10 earphones now and experience the best sound quality. UNIT SIZE : 10mm(MOVING-COIL SPEAKER) IMPEDANCE : 16Ω±3 WORKING POWER : 100mw THE HEADSET PIN : 3.5mm stereo plug FREQUENCY RESPONSE : 20-20000Hz ACUITY : 103db±3 S.P.L at 1kHz WIRE LENGTH : 120cm±5 NOISE ISOLATION : Yes