A Powerful Mosquito Killing System! Wouldn't it be great if there was an effective mosquito killing system that you didn't have to plug in? The cordless Independence mosquito trap runs on 4 'C' batteries and offers up to 1 acre of protection from mosquitoes and other biting insects. And because there is no power cord to plug in, this reliable mosquito repeller alternative can be placed wherever you need it most. All weather performance - begins catching mosquitoes immediately!