| 主权项 |
1. A hoop, comprising:
a plurality of lights coupled to a power bus; a tube with a first end and a second end, where the plurality of lights and the power bus are located in the tube; and a coupler that is permanently attached to the first end of the tube with a fastener, where the fastener indicates a voltage of a power supply that supplies power to the power bus and the coupler has at least two positions that represent two different voltages. |
