This is brand new & sealed in box The Snuza Hero MD Portable Baby Breathing Monitor is a small, lightweight device that monitors your baby's breath to help detect potential issues such as SIDS. This medical-certified pump operates on 1 CR2 battery and features a light indicator and battery warning for easy monitoring. With its compact dimensions and unisex design, this portable breathing monitor is ideal for keeping a close eye on your little one during nap time or bedtime. Has been opened however never been used.