Earbuds made of wire JR-EC04 model In ear Speaker: Φ10mm Range of frequencies: 20 Hz–20 kHz Impedance of AC: 16±15%Ω 85±3dB is the sensitivity. Power rating: 3 mw Maximum power instantaneous: 5 mw Length of cable: 1200±30 mm Composition: TPE cable Type-C plug 15g is the net weight.