the number of channels refer to how many things it can control. Such as: power windows, power locks, door solenoids, air bags, etc...... If it were a 4 channel it would have 4 buttons you could program #1 to work the driver window, #2 the passenger window, #3 to lock the doors, and #4 to unlock the doors.... As far as good name brands go, it is about like anything else you get what you pay for.
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