We are shenzhen CJC Industry co., LTD. We specialize in headphone, mutltimedia speaker and home Theatre, our serial CJC and Hyundai product with perfect sound and reasonable price. Impedence, 32 ?5%, sensitivity,116?dB at 1KHz. R.M.S:25mW power capability, 250mW add: we can make the product according the customer''''''''''''''''''''''''''''''''s request.