Using Multiple VEXplorers

I just want to ask if I would buy 1 more new vex blue transmitter and receiver, would it interfere with other vex blue transmitters and receivers?

Yes, there will be interference. All the VEXplorer or the VEX-RC “blue” product line operate on the same frequency. Therefore, only 1 unit can be operated at the same time in the same area. This can not be changed.