1. The business mainly operates in 39 countries worldwide, with core products including water filtration vacuum cleaners, cordless vacuum cleaners, kitchenware, and air purifiers.
2. It is a well-known brand in cleaning appliances, with competitors including Rainbow, Bissell, Dyson, Eureka, Hoover, Kalorik, and Shark.
3. The official website brand terms are "Sirena" or "Sirena Inc.".