Limited-time significant price reduction! ✨ 3,799 yen ⇒ 3,399 yen This is an "Itsukushi" baby sensor. It attaches directly to the diaper, so there were almost no malfunctions. If the baby shows no body movement or is in a face-down position for 15 seconds, the main unit vibrates to alert the baby. If there is no change in the baby after that, it vibrates and sounds an alarm to alert those nearby. I purchased it in July of this year, and it was very helpful when putting the baby to sleep in a separate room during sleep training. I am selling it because I no longer need it after sleep training is complete. All accessories are included, and I will ship it in the original box. Operation has been confirmed. The outer box has a tear of about 3 cm when opened. Please refrain from purchasing if you are concerned about used items. *Although the operation has been confirmed at the time of listing, please be sure to check the operation before use to ensure there are no abnormalities. The seller is not responsible for any failures or accidents that may occur with this sensor, so please use it at your own discretion. The following is a quote from the Rakuten official website ↓ Rakuten Ranking 1st Place 【Itsukushi Official】Body Movement Sensor IMS-01 Medical Device izxi Itsukushi Baby Sensor Alarm for Infants Baby Breathing Body Movement Apnea Prevention Sleep SIDS Rolling Over Sensor Rolling Over Alert Type of medical device: General medical device Size: Length 55mm x Width 46mm x Thickness 23mm Main unit weight: Approximately 35g (including battery) Power supply: Lithium-ion polymer battery (3.7V, 450mAh) 【During use】Temperature/Humidity/Atmospheric pressure Temperature: +5℃～+40℃ Humidity: 90% or less (no condensation) Atmospheric pressure: 700hPa～1060hPa 【During storage】Temperature/Humidity/Atmospheric pressure Temperature: -40℃～+55℃ Humidity: 95% or less (no condensation) Atmospheric pressure: 500hPa～1060hPa Charging time: Approximately 2 hours Service life: 3 years Waterproof and dustproof performance: IP22 Materials: ABS resin, TPU (thermoplastic polyurethane), TPE (thermoplastic elastomer), polycarbonate Set contents ・Body movement sensor IMS-01 ・Instruction manual ・Attached documents ・Charging cable (USB type-C)