Electronic equipment 1.Electron add plastic 2. CE/ROHS 3. High quality 4. Competitive price Electronic equipmentSpeaker : φ10mmlmpedance:32Ω ±10%Sensitiviy :105dB S.P.L at 1KHzFrequency Response:20Hz~20,000HzRated power:15mWPower capability:150mWCable Length:1.2Plug Type: φ3.5mm Stereo Pure cotton qualitative small headset