... much more beautiful effect .Features:1. The device does not use any chemical substances, can be ... widely used in home, apartment, warehouse, hotels, supermarket, garages, office, etc. 2. The device is harmless for ... , fleas, crockroaches, silverfish, etc.4. The device is transparent and to the emitted LED light, it ... coverage, it is recommened to use a device in every room or enclosed area.7. When you ...