Thank you for viewing. This is the "Sense-U Baby Monitor 3 Baby Sensor." It's a reliable baby sensor that attaches to your baby's abdomen to monitor movement and breathing. It works with a smartphone app to detect and notify you of things like breathing and sleeping on their stomach. 【Product Overview】 ・Latest version: Sense-U Baby Monitor 3 ・Connects to your smartphone via Bluetooth for notifications ・Monitors breathing, movement, sleeping on stomach, temperature, etc. ・Recommended for peace of mind at night and during sleep 【Condition】 ・Used for about 1 month ・Operation confirmed ・Used in a smoke-free and pet-free environment ・It's in almost-new condition as it was hardly used, but please understand that there may be minor scratches due to it being a used item. All accessories are included. This is a popular item that supports peace of mind during your baby's sleep. Please consider it. Feel free to ask if you have any questions.