Diameters:12ft-16.5ft (3.5- 5.0 meter)Coverage: 2,000-6,000 square feet  Perfect for gyms and fitness studios, office spaces, showrooms, retail stores, library, school, stadium, auto repairs shop, coffee shop, bar and other medium-sized spaces.  

Diameters: 6.5-10 feet (2.0-3.0 meter)Coverage: 7,00-3,000 square feet  Perfect for school, library, gym, office, bar, restaurant, supermarket,playground, museum, mosque, church and all other commercial spaces.