This is a baby alarm that detects and alerts you to your baby's movements. (baby smile) It can be used from the newborn period, allowing you to watch over your baby with peace of mind. ✅ Usage period: Approximately 2 months ✅ Operation confirmed ✅ Includes 3 AA batteries, so you can use it immediately. 【Condition】 There are no noticeable scratches or stains, and it is in relatively clean condition. (Please understand that this is a used item, and purchase accordingly.) 【Reference Specifications】 ・Target age: 0-12 months ・Applicable weight: 2-10kg ・Weight: Control unit approx. 61g (excluding batteries), sensor panel approx. 420g 【Caution】 This product is not a device for preventing Sudden Infant Death Syndrome (SIDS) or diagnosing sleep disorders. Please use it only as an auxiliary device to detect body movements.