Material: ABS Size: 5.8*3*9.7cm Gross weight: 50g Quantity: 1/2 Use voltage: AC 90V-250V/ 50/60HZ Power rate: 5W Output frequency: 50kHz-60kHz Effective coverage: 80-120m2 (open space) Bionic ultrasonic technology to protect your property from any pests Mosquito repellent is safer and more environmentally friendly than traditional mosquito repellent Applicable to: family, grocery store, clothing store, food store, furniture store, department store, hotel hospital, warehouse, etc. Tips: 1. The machine should be installed at a distance of 20 to 80 cm from the ground, and it should be inserted into the power socket perpendicular to the ground; 2. The installation point should avoid the sound absorbing materials such as carpets and curtains as much as possible, in order to prevent the reduction of the sound pressure and make the sound range smaller and affect the insect repellent effect; 3. In the first few days of use, if it is found that the activities of rats and pests have increased significantly, it is normal. Because the rats and insects hiding in the nest were attacked by ultrasound and electromagnetic waves, they fled their original hiding places. 4. If it is placed in a warehouse or a place where items are stacked, or a multi-room floor, several more local machines should be placed to increase the effect