This is a salute. Nowadays, salute is indispensable for wedding celebrations and opening ceremonies. But there are customs in some places, and firecrackers must be set off when getting married. However, firecrackers are unsafe and banned in many places. So now there is a new product on the market called firecrackers salute, which uses oxygen and liquefied gas. Connect 12V power supply and operate remotely, which can make firecrackers ring for more than an hour without stopping ringing. Very convenient and practical, safe and environmentally friendly. It is a new generation salute and a high environmental protection product.