*利用锁相不技术确保发射和接收更加稳定可靠*D为立体声;D-M为单声道*工作频率:40.68MHz适用于欧洲市场49.86MHz适用于北美市场*UsePLLtechnologytomakesurethetransmittingandreceivingmorereliableandstable*suitablefrequency:49.86MHz(forAmericanmarket)40.68MHz(forEuropeanmarket)*Dforstereosound,D-MforMONOsound