Portable ultrasonic mosquito repeller

The theory:
Battery Mosquito Repeller using low-frequency audible sonic waves that irritate and drive most mosquitos away.
 
Applicability:
Battery Mosquito Repeller: Home,apartment,travel,picnic,camping and so on,it cover the area around your body and repel the mosquito away.
 
Features:
1.Only effective with mosquito, does not interfere with the operation of radio,televison or other electronic equipment
2. It is highly economical,convenient and environment friendly.
3. Artistic and exquisite design.
 
Method:
1.To open the battery compartment cover,rotate the cover,to the switch OFF position.
2.Install the battery with the positive end inside the battery compartment.
3.Replace the battery compartment cover by pushing the cover back with slight force to ensure that the indicator lines are aligned to the switch OFF position.
4.To switch the device on,rotate the cover clockwise to the switch ON position.
 
Specifications:
Power supply:1 x AA 1.5V battery(not included)
 
Attention:
1.Long time not use,please turn off power and take off the battery.
2.That product is not waterproof,please do not used in damp environment.
3.Do not closed your ear to the machine,so as to avoid hearing damage.
4.The efficiency of the portable mosquito repeller,may very depending on the different species of mosquitos as well as atmospheric conditions such as a damp environment.