Electronic Ultrasonic Mosquitoes Mice Cockroach Repeller Indoor Pest Control Features: 1. Made of high-end flame retardant material, durable, wear and corrosion resistant. 2. It is mainly designed for repel mice, mosquitoes, cockroach and it also has some control for other pest, such as mites, bedbugs, fleas, ants, spiders, silkworms. 3. Nightlight function: using micro-electricity intelligentlly work at night and stop work in daytime. automatically induction, no manual switch is need, the light wave that ultrasonic produce will attract mosquitoes to the product. Allow you have a good sleep.  4. The most effective area coverage in open environment will be about 120㎡, normally it need to install about 1~2 products each house.  5. Indicator light: red light for power light; yellow light for electromagnetic work light, when the yellow light on indicates produce low frequency electromagnetic; green light for ultrasonic work light. Specification: Material: ABS Power: ≤6W Electromagnetic frequency: 0.8-8HZ Ultrasonic Frequency: 9-40KHZ(bionic wave), 20-70KHZ Protection Range: under 120㎡ open area.  Size: 10*7.5cm/3.9*3in(L*W) Package list:  1 x Ultrasonic Pest Repeller Note: 1. The bionic wave is suggested e when there is no people or pet exsits,  beacuse it will do harm to people's auditory sense.  2. Make sure the products are not covered by furniture, electrical appliances and other objects when using.  3. It should be used in severe area that suffer greatly from mice and mosquitoes. You can install it in centre position of the room when mice and mosquitoes disappear.  4. It will reach best result of rats and insects when it is continuous work for 24 hours.   5. It is forbidden to disassemble the product to repair if you are not professional person! Avoid electric shock or safety accident.  6. Install height: it should be installed above 20-30cm from the wall socket for repel mice. 80-100cm for repel mosquitoes. As for mite or other pest the horn mouth should be aim directly towards the pest area.