This is a very bad product. I will say it totally worthless because this does not work properly. Even after using it whole night mosquito will not run away from the room and they will be barking near the ears. Smell is very dirty which can make you crazy but mosquito does not suffer from it. After using good knight xpress you will feel vertigo when wake in the morning and do not feel comfortable. I have used this product many times but have found the result valueless. Do not buy this product and opt some other alternative to make your night wonderful. Not recommended this product.