1, it is the perception system for the insect nervous system and get rid of mosquitoes by physical means. Both environmental health and safe and effective. Can effectively avoid the use of drugs on the environmental pollution, violations of the human body. 
 2, it is the use of broad-spectrum broadband ultrasound, and continue to change the sweep range, so that mosquitoes can not have "immunity" and "Adaptation." 
 3, humans, and mammals can not be perceived by the launch of the product ultrasonic, and the minimum transmission power lines, so absolutely harmless to humans and pets. 
 4, especially for travel environment green living requirements of modern life. 
 5. 3V power supply. 23 X 16MM PCB size. 
 6. Button on / off work 
 7. LED indicate working state. 
 8. Can short-circuit point selection started after 30 minutes, 60 minutes, 120 minutes off automatically. (OK button to select time) 
 9. Can short-circuit point selection started, has been working, until the button OK to close. 
 Very good price!!! 
 Welcome to know!!