Features:
1) Emits multi-frequency ultrasonic signals to drive away mosquitoes
2) Three AA batteries (not included), or simply plugs into any 110-volt /
230-volt AC outlet for outdoor and indoor use
3) Effectively covers an area up to 150 square feet (15 square meters)
4) Green LED indicates working status
5) Low energy cost (3W)
6) Safe around children, pets, electronics and computers
7) Patent No.03345747.6