Features: The product has no electromagnetic wave radiation, no noise pollution, safe and environmentally friendly! This product mainly removes mosquitoes. At the same time, it is also effective for pests such as cockroaches, flies and mice. The plastic shell of this product is made of ABS flame retardant raw material, and the material is environmentally friendly, which reduces the pollution twice. The ultrasonic waves emitted by this product have strong effects on mice, mosquitoes and cockroaches. They are non-toxic and tasteless and have no effect on people and family pets. This product adopts the physical method, which is environmentally friendly, safe and effective, and can effectively avoid environmental pollution and harm to the human body after using the drug. Specifications: Condition:100% Brand New Material: ABS/Plastic casing Color: White, Black(Optional) Size: Approx.6.2*4.5*1.7cm/2.4*1.8*0.7in(L*W*H) USB charging: DC / 5V 1-2A Working voltage: 3.7V Static working current is less than 1. 5UA Dynamic working current is less than 1. 8MA Working frequency 15-75KHZ (A utomatic cyclic scanning) Power supply: built-in polymer electrode 100MA.3.7V(Included) Effective range: 10-60 square meters Package List: 1*Insect repeller 1*Instruction manual 1*Data cable 1*Carabiner Note: This product can be equipped with USB power adapter, computer, mobile power and other products for use. If you do not use this product for a long time. Please disconnect the power supply to ensure the normal life of the product. To ensure the stability of the product use. It is recommended to use the charger of the brand 5V-2A or the mobile power supply. 1、The product has no electromagnetic wave radiation, no noise pollution, safe and environmentally friendly! 2、This product mainly removes mosquitoes. At the same time, it is also effective for pests such as cockroaches, flies and mice. 3、The plastic shell of this product is made of ABS flame retardant raw material, and the material is environmentally friendly, which reduces the pollution twice. 4、The ultrasonic waves emitted by this product have strong effects on mice, mosquitoes and cockroaches. They are non-toxic and tasteless and have no effect on people and family pets. 5、This product adopts the physical method, which is environmentally friendly, safe and effective, and can effectively avoid environmental pollution and harm to the human body after using the drug.