This is a baby movement sensor. I used it for about a month until my baby could roll over. Thanks to this, I was able to sleep peacefully every night. Unlike other products, it detects rolling over and is rechargeable, making it cost-effective and highly recommended. If you're on the fence, you should definitely use it. A sensor that detects the baby's movements and supports safety. - Brand: izixi - Product Name: Baby Movement Sensor - Included: USB cable - Function: Movement sensor Set Contents ・Body movement sensor IMS-01 ・Instruction manual ・Attached documents ・Charging cable (USB type-C) A rechargeable body movement sensor that detects the baby's movements and alerts you with an alarm when the baby is lying face down. Retail price: 5980 yen Available for immediate purchase No price reduction