The Portable Insect Killer from Lifesystems is perfect for travel and the outdoors. The unit slowly propels an odourless scent that is harmless to humans but very effective against unwanted biting bugs. The Insect Killer is supplied with one cartridge that provides up to 7 nights protection before it needs to be replaced. Requires 2 x AA Batteries (not included). Refill Tablets are available. Will repel mosquitoes, midges, bed bugs and other biting insects. Dimensions: 70 x 38 x 70mm Weight: 125g The battery powered Portable Insect Killer can be used where mains power is not readily available.