Bug zappers can definitely be used indoors - in reality, that's considered one of their main uses. Chemical rechargeable bug zapper zappers, which lure bugs with harmful chemicals, are generally used outdoors to reduce contact with youngsters or pets. However, Zappify mosquito zapper bug zappers that attract insects with ultraviolet light draw little electricity, are fairly inconspicuous (aside from the electric crackle when a bug is zapped), and can be used indoors or outdoors. Some look like lanterns, some resemble little heaters, some run on batteries, and some may be plugged into a wall outlet. Some zappers include a removable tray that catches the remnants of zapped bugs