H12 2 PCS Ultrasonic Electronic Mouse Repeller Household Mini Mosquito Repeller, Product specification: US Plug 1. Material: ABS 2. Size: 90x56x50mm 3. Weight:: 81g 4. Rated power: 5w 5. Rated frequency: 50-60Hz 6. Applicable area: less than 20 square meters Instructions for use: 1. The machine should be installed at a distance of 20 to 80 cm from the ground, and it is required to be inserted into the power socket perpendicular to the ground 2. There shall be no tall obstacles within 1 meter from the front of the product (that is, it shall not be installed on the back of objects such as refrigerators, wardrobes, sofas, etc.) 3. The installation point should be avoided as far as possible from sound-absorbing materials such as carpets and curtains. The reduction of sound pressure will reduce the sound range and affect the insect repellent effect; 4. In the first few days of use, it is normal if there is a significant increase in activities such as rats and pests. Because the rats and insects that usually hide in their nests are attacked by ultrasonic and electromagnetic waves, they fled their original hiding places; Precautions: 1. Moisture-proof and waterproof; 2. Do not use strong solvents, water or damp cloth to clean the body, please use a dry soft cloth dipped in some neutral detergent to clean the body; 3. Do not drop the machine or subject it to strong impact; 4. Operating environment temperature: 0-40 degrees Celsius; 5. If it is placed in a warehouse or a place where items are stacked, or on a multi-room floor, several more machines should be placed to increase the effect. 6. The product should work uninterrupted for 24 hours during use. In addition, doors and windows should be closed at night. If you open it during the day, the mouse will sneak away when you open the window during the day.