... 4.one pcs on box High voltage ekectrical pest killer Advantages 1.Low Noise and high safety: Ultra-quiet fan ... using electroshock mosquitoes catchers, and there is no high voltage, so its very safe and quiet.2. Purifying air ... table which is 1 meter to 1.5 meters high from the ground, and if there is no ... mess hall, farm, packinghouse,industrial building, outdoors etc. High voltage ekectrical pest killer