This is an alarm to prevent SIDS (Sudden Infant Death Syndrome). It's a type that attaches to a diaper. I used it for one month. The battery still has some life, but I also purchased replacement batteries, which I will include. The box will be flattened for shipping. Operation has been confirmed. - Product Name: Baby Monitor Baby Sensor - Included Items: Instruction manual, box - Color: White/Blue - Power Source: Battery operated