Dhakar Engineers’ electronic ultrasonic pest repeller is a high-tech electronic device to repel rats, insects, lizards, cockroaches, pigeons and spiders, etc. It can be used to repel pigeons in factory sheds, godowns, warehouses, etc., and also to repel rats in computer rooms, cable trenches, control room, stores, offices, etc. It transmits high intensity sound at high frequencies, which is not audible to human beings. The sound generated are fiendish in the way that it penetrates the pests brain and nervous system and causes fear, discomfort and creates intolerable environment for different kinds of pests but not audible to human beings and absolutely no side effects. Operation is simple: just plug DE ultrasonic pest repeller into electric socket, switch on and forget. The machine can be kept on for working 24 hours continuously day and night; and no sound, no fuel, no maintenance and negligible power consumption.