... for best receptionFour groups frequencies can be offeredAutomatic Antenna SwitchingBlack and yellow shell color optionalTriple, buffered AV outputsCan receive 4 ... RF4, with different position of the number 1, 2, 3 names different channels from CH1 to CH8.Operation for Diversity ... use--Connect the AV cable to AV5, and connect the antennas, and then apply the power--Switch on the power ...