1.Features:Super sound quality, powerful bass system 2.Usage: DJ ,Studio ,computer,mp3/mp4,mobile phone 3.Approvals:CE,ROHS. Specifications :1. Drive Unit: 40mm 2. Impedance: 32 ohms±15%3. Freqency Response : 20-20,000Hz 4. Sensitivity: 104dB±3dB5. Connector: Golden 3.5mm6. Cable Length: 1.5mImage: