The one other assembly desired to the Flowtron was inserting the octanol cartridge, which slides very easily to the cartridge holder on the bottom in the unit. The cartridge lasts about 30 days and charges about $fifteen for just a replacement a few-pack. All through my tests, I checked https://flowtronbk-40delectronici27260.tinyblogging.com/considerations-to-know-about-flowtron-bk-40d-electronic-insect-killer-72544433