... Flour processing factory, food processing factory, rice factory, pharmaceutical factory, animal feed factory, granary, etc. 2. It applies to the places ... air condition, dining-room, storeroom, etc. Main Caution:1. This repeller should be installed at 20-80 centimeter away from the ... from their living place after the attack of the ultrasonic. 4. This repeller can be plug directly at AC power socket. ( ...