... hours 2. Delivery time > 95% 3.Quality Control > 100% 4.After-sales Service > 100% 5.OEM >7 years experience 6.Provide more ... .0w Maximum 3.0w FO 970±20% Hz S.P.L 100±3dB/1.0Watt 0.1Meter. Average At1000 ,1182,1504,2000Hz ... .70% balance money before delievry. 2.Western Union 3.Others:L/C,O/A..... Factory Advantages: 1. Factory produce can ensure ...