I purchased this item new and used it for about 3 months. I am selling it because my child has outgrown it. The alarm sounds reliably, which gave me peace of mind. I used to be unable to sleep at night due to worry, but I was able to sleep soundly after I started using this! I hope someone will find it useful. * Operation confirmed (I confirmed that the warning sound plays) * Requires 3 AA batteries. Please prepare separately. * Instruction manual included Please refrain from price negotiations for this product. **Product Overview:** The BabySmile Baby Alarm E-201 is equipped with a high-performance sensor to protect your baby's safety. It detects the baby's movements and alerts you to any abnormalities, providing peace of mind and support for childcare. **Design:** The simple and stylish white design matches any interior. Its compact size allows for flexible placement. * Brand: BabySmile * Model Number: E-201 * Product Name: Baby Alarm * Included Items: Instruction Manual * Included Items: Power Cable * Color: White