This energy-saving pool heater will heat your pool water efficiently by solar energy, and therefore extend your swimming season. No gas or electricity is required. Made of HDPE material, the pool heater is heavy duty for long-term service. Aluminium legs are adjustable, so you can easily point the heater towards the sun. Additionally, you can also increase heating efficiency by connecting several heaters together. Delivery includes 1 pool heater, 1 hose, 2 connectors, 2 clamps and 2 rubber rings.