A, and this products of application occasions: 1, and cannot with bait, and pesticides of flour factory, and food factory, and meters factory, and pharmaceutical factory, and feed factory, and granary,; 2, and by rat insect pollution plagued of cinema, and restaurant, and supermarket, and department store, and hotels hospital,; 3, and often met rat, and insect by bite of grocery store, and clothing shop, and food shop, and home furniture shop,; 5, and Villa, and homes, and air conditioning bedroom, and organ units canteen and the storeroom,. II, and note matters: 1, and this machine should installation in away from ground 20~80 cm at, requirements vertical Yu ground insert Power Socket; 2, and installation points should as avoid carpet, and curtains, sucking sound material, to prevent sound pressure of reduced makes sound domain variable small and effects drive insect effect; 3, and using of Qian days within, if found mouse, and pest, activities obviously increased, belongs to normal phenomenon. Because usually hiding in nests in of rat, and insect by ultrasonic and electromagnetic waves of attack Hou, have fled its original of hiding of by; 4, and this machine directly into Exchange mains socket in the using (using voltage range: AC90V~250V, frequency: 50Hz~60Hz); 5, and note: moisture, and waterproof; 6, and don't using strong solvent, and water or more wet of cloth clean fuselage, please using dry soft cloth dipped some neutral detergent clean fuselage; 7, and do not makes this machine dropped or makes its by strongly of impact; 8, and The use of ambient temperature: 0~40sheshidu; 9, if placed in a warehouse or goods piled up, or multiple room floor, you should put a few more local, in order to increase the effect. Three main technical parameters: 1, model: KD-28A 2, use voltage: AC 180V-250V/50HZ,AC 90-110V/60HZ;3 power: 8W 4 output frequency: 20kHz-55kHz 5, effective coverage area: 100-180 square meters (in open area)