ultrasonic mosquito repeller Application: personal,outdoor,easy to carry, effective drive mosquito range 10 square meter AR110 watch-style driving mosquito+outdoors Helper ... battery c.work Current: 2~4mA d.Male mosquito frequency: 18.4kHz e.Beating wing frequency of simulating ... f.Sound Wave Sound Pressure: 50dB 6,Notes:a.The Products use Ultrasound principle,imitating male Mosquito and dragonfly ...