This firework launcher is designed to add color and excitement to weddings, parties, and celebrations. Stage fireworks using this system can help create a joyful atmosphere and deliver a memorable show. Two quantity options are available. How to use Insert fireworks equipped with electronic ignition heads into the electronic base to start remotely. The remote control can operate multiple fireworks at the same time. You can also set a timer for timed and sequential firing. (Electronic fireworks are not included; you need to them separately.) Product information Applicable to products with a diameter of less than 4.3 cm. The remote control range is about 70 meters. Each receiver requires No. 5 batteries. Includes two remote controllers; batteries are not included. Professional design This ignition system is designed for indoor cold fireworks, stage fountains, and singleshot fireworks. Cold flame fireworks can enhance the effect of indoor displays. They can also be used outdoors, but for results use them in a dark environment.