1.SAFE PEST CONTROL:-This product uses environmentally friendly frequency conversion ultrasonic waves to interfere with the central nervous system, taste, hearing and visual nervous systems of pests. Repel annoying pests.2.MULTI FUNCTIONS:-The rat repellent with 4 modes can meet all your needs. Different light colors represent different functions, and you can choose the appropriate mode to use according to the environment. The operation is very simple.3.EASY TO USE:-Easy to install and easy to carry, just plug it vertically into a wall socket 11.8 inch - 23.6 inch above the ground. And adjust the mode according to the needs of the environment to achieve the best repelling effect.4.EFFECTIVE COVERAGE AREA:-The effective coverage is wide. The maximum effective range of ultrasonic mouse repellent is 800~1600 sq.ft in one single room. If there are multiple rooms, it is recommended to install one in each room.5.WIDE APPLICATION:-The product works long term and you will see noticeable improvement after 4 weeks. Suitable for warehouses, storage rooms, shops, offices, restaurants, classrooms, hotels, hospitals, garages, etc.