Drive Off Problem Birds Like Ra vens and Crows with Birds in Distress Sounds This bird control device uses sonic bird repellent technology. Bird-X Peller PRO 2 targets crows, blackbirds, grackles, ravens cormorants. Broadcasting the birds' own distress calls creates a danger zone . This electronic bird control device uses fear to get rid of pigeons and other birds for good. Proven in extensive field tests, BirdXPeller PRO significantly reduced or completely eliminated bird infestations. How it works BirdXPeller PRO broadcasts bird distress cries from a microchip supplied by a major American university . Birds hear the cries, perceive danger and become agitated and disoriented. Thinking their flock mates are in trouble, the birds flee the area . . . never to return. Species-Specific and Programmable Bird Repellant Devices Target pest birds with a species-specific approach. Choose from eight bird sounds for bird pest control. Reprogram the BirdXPeller PRO periodicallyor when different birds pester you. Target selected birds crows, blackbirds, grackles, ravens cormorants. Volume of sounds Time off periods Choose delays from 60 seconds to 30 minutes. Time of operation Choose day, night or 24 hours. Keep bright lights from shining on the photocell for proper operation. Random operation randomly plays recordings in non-sequential order. Best results from this mode. Environmentally Safe. Harmless to Birds BirdXPeller PRO uses loud, terrorizing sounds for effective pest bird control. Easy Operation 110vAC power adapter included . Optional solar power panel keeps 12VDC deep cycle marine battery not included charged. Battery powers the PRO. Heavy-duty BirdXPeller PRO is made of sturdy plastic. Built-in front directional speaker. Rear controls. Included a plastic rain cover with mounting tab, a plastic cover for the programmable switches, an AC power adaptor with cord, and complete instructions. Synergy Sound devices are even more effective us This item ships from a separate warehouse and may require extra time for delivery.