The POTTY WATCH lets your little one know when it's time to GO. Just set the timer for 30, 60 or 90 minutes and flashing lights and music gently let your toddler know it's time to try going to the potty. The timer automatically resets itself to provide consistent remainders all day long. The Potty Watch does the reminding so you don't have to. If batteries are not functioning when you receive the product, please reference the troubleshooting guide on the manufacturer's website.