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Remove the doorbell’s battery compartment cover. 2. Insert 4 AA batteries. 3. To change the doorbell tone, use a flat blade screwdriver to remove TONE, and insert it into the other two pins. 4. Slide CH 123 to the same channel as the indoor intercom. 5. Slide VOL 1 2 3 to the desired volume and replace the cover. 6. Plug the indoor intercom into a standard AC outlet. 7. Mount the doorbell using the supplied bracket, anchors, and screws as shown. Doorbell Intercom BELL — Press to sound the indoor