Mosquitoes don't have to put a damper on indoor or outdoor summer fun. This hangable electronic device keeps them far away without the need for poisons or chemicals; it emits a noise that deters mosquitoes at an effective range of approximately 215 sq ft, but is harmless to humans and animals. It also features 720 hours of continuous battery life. Requires 2 AA batteries (not included). Measures 4" x 4" x 7/8". Gift boxed.