PART 3. USING THE AT W-T102 PLUG ON TRANSMITTER The plug on transmitter operates on one 9V battery. Please make sure that your batteries arc fresh, We recommend that you use Alkaline batteries and that you avoid using Ni Cad if possible. Insert the batteries into the battery compartment and gently slide the battery cover back into place. To set the channel of operation, locate the X1 and X10 channel selector switches. Set the switches tot he to the corresponding channel as set on the receiver.