With standard external interface High gain aerial, the wireless signal transmitter has ... 3C,CE,FCC,ROHS,LVD ...certifications . With standard external interface and high gain aerial, characterized by stable and reliable data ... M-4904Working Frequency: 2400~2500HzSignal Interval: 5MHzInterface Speed: 250KbppsInterface connection: USB, Rs232, DMX512 (Input) DMX512 (Output)Channels: 16Adjustment: DIP ...