Backyard AVENGER with CO2 regulator and used 20lb aluminum CO2 cylinder. Can be used for target control of mosquitoes, flies and yellow jackets. CO2 tank ships empty due to shipping regulations. Contains: Backyardavenger, Used 20lb aluminum CO2 cylinder, 30 PSI fixed Pressure Regulator, 10 ft of PVC tubing and stainless steel hose clamps, One year supply of SKEETO LURE, One year limited warranty.