I've used it for about 3 months. Includes a set of 2 new batteries. I only used it at night, and the batteries lasted for 1-2 months. I'm selling it because I stopped using it after I started sleeping on my stomach. There are no noticeable scratches or stains. Operation has been confirmed. Includes box, instruction manual, and 2 batteries. Sense-U Baby Movement Sensor Movement Alarm Pink sense u General Medical Device Baby Sensor Baby Monitor Movement Sensor Anti-Roll Brand: Sense-U Material: Acrylonitrile Butadiene Styrene (ABS) Color: Blue Compatible Devices: Smartphones Screen Size: 0.96 inches Product Dimensions: 40mm length x 40mm width x 10mm height