Driver 1. Export to Pakistan ,Africa ,Europe ,America. 2. Passed ISO9001 ,CE ,ROSH . 3. Two workshop for producing . DriverFrequency Range:800HZ-20KHZSensitivity:105 dBPower Handling: 40W rmsImpedance: 4/8 ohmQ/C ISO9001TT PAYMENT: 30% IN ADVANCEMOQ:300 PCS Driver units