2 Pack 50 Watt Small Aquarium Heater, Submersible Small Fish Tank Heater

2 Pack 50 Watt Small Aquarium Heater, Submersible Small Fish Tank Heater for 5-15 Gallon Betta Turtle Tank Heater.I found them at the liquidation Store.They look new and clean, with the factory wrapping on the cable.They probably fell out of the box in the store. I didnt find the directions. There is a button for setting the power but i cant tell you what it does, or how it works. I see the display flashes numbers after powerup.They do power up and heat (tested in big bowl of water).I measured the power being pulled. It is in the range of 60 to 70 watts, doesnt seem to be adjusted very well. But if you just need to heat up some water and dont worry about accurate control, these should be ok.Amazon sells 2 for $25 outstanding for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.