Each shadowbox is 3" square and 1.75" deep, with 3/8th inch scratch-resistant plexiglass attached with brass escutcheon pins. Glass mircobeads inside add color and an interactive liquid effect. Each light is powered by 2 (two) 3V lithium watch batteries (CR2032), and can be found at any store that sells double A's. They should last approx 10 days when left on
6 to 8 hours a day (store hours). All boxes come with one complimentary fresh set of batteries. Production time ranges from 1 to 4 weeks, depending on my workload.