This is a set of a basking light and a heater for an aquarium. The basking light is a clip-on type and has an on/off switch, making it convenient. I used it for turtles to bask and for adjusting the water temperature in winter. The heater is the type that is placed in the water. <Voltage/Power> Light: 100V 20W Heater: 100V 71W This is a used item, so please consider purchasing only if you understand this. The packaging will be recycled materials, so please be understanding. Thank you for looking.