Usage instructions: 1. Unscrew the protective cap from the refill bottle. Position the refill below the diffuser and screw in. 2. Plug in the diffuser (in 240 volts ac only). Ensure the diffuser is in the vertical position. Switch power on to start repelling mosquitoes and flies. To deactivate at any time, switch power off. The light indicator will turn off. 3. To adjust control, gently rotate the bottom section of the diffuser with (i) = minimum and (iii) = maximum setting. 4. Replace the bottle when it runs dry. Switch off the plug socket, remove the device from the outlet and unscrew bottle. This mortein peaceful nights mosquito & fly plug in refill will last up to 60 nights x 8 hours (480 hours) when used on the lowest setting. Not to be used for any purpose, or in any manner, contrary to this label. Before use, read all directions on the outer pack. Use this refill only with mortein peaceful, nights mosquito & fly plug in unit.