... : PAL/NTSC/SECAMInput Voltage: 8-12V/500mA How to Use:To receive 4 different channels at the same time ... :--Connect the antennas then connect the AV cables to: AV1,AV2,AV3,AV4, and then connect ... power--Switch on the power button--Set RX1,RX2,RX3,RX4 to the same channel--LED5 for RF1 ... strongest signal is confirmed. It will automatically switch to the receiver with the strongest signal Package content: ...