Step 4: Use the belt in potty training
Try to estimate the amount of time that can elapse before the child needs to use the bathroom and set the alarm to go off 5 minutes before that. You can always adjust the alarm later if it's too much or too little time. I suggest using plastic training pants over your child's underwear if you want to minimize laundry during this time.
Fasten the belt around the child's abdomen with the alarm over the bladder. The alarm should be small and low profile enough that he can still wear his pants over it.
Let the child have lots of liquids, especially his favorite type. If the alarm you bought doesn't have an audible alarm, set your own so you'll know when the belt will go off. When it does, take the child to the potty chair, have him sit down, and praise him for sitting there. Rewards are a personal thing; use what works for you.
Consistency is especially crucial for kids on the spectrum. It's terribly confusing to them if you keep going back and forth from diapers to underwear. Potty training unique children can be challenging and require a heap of patience, but it will pay off. Hang in there.
If you're worried about the alarm getting wet, put it in a small ziplock bag before sliding it into the belt pocket. After the child uses the potty, reset the alarm, wash hands, and repeat. Good luck and thanks for reading!