AJ-903TA ( Water proof AV Transmitter Receiver )
Water proof transmitter
  Output power:
 3W
  Frequency :
 1.2GHz, wireless Video+ Audio
  Channel:
 Four channels optional
  Range:
 2000-6000m
  Power:
 DC12V 570mA
  Dimension:
 2450x210x80(mm)
  Weight:
 1700G