DC 5V USB LED Chip Beads Surface Dimmable Bulb Transformation LED Light SourceDia 32MM 5730SMD 3W Light Single Colorcommodity parameters: LED 5V shade lamp bead board Size: D=32MM ID=10MM Power: 3WOutput voltage: 5VLight source: LED comfortable sourceForm:with 20cm lineApplicable scenes: dwelling room, bedroom, indoor and outside parties, birthday festivals, KTV, restaurants, bars, dance halls, etc. Note: This lamp board isn't always allowed to instantly hook up with 220V household electricity, in another case it is going to burn out the lamp board and might get an electrical shock. It can solely hook up with 5V input voltage, equivalent to 5V VOLTAGE of USB switching cord and charging power.package:1pcs led chips