Bird-X BirdXPeller Pro Electronic Bird Repeller Version 1 for Pigeons, Starlings, Sparrows, & Gulls Power Requirements: 110v or 220vAC or 12vDC Emits natural bird sounds and predator calls that scare away pest birds Safe, humane, and effective pest control Covers up to 1-acre of property with fully customizable settings. Sound Pressure: 105110 db at 1 meter. Frequency: 35 kHz Version 1 repels Pigeons, Starlings, Sparrows, & Gulls