- Bird Chaser- Repels crows, pigeons, blackbirds, & sparrows- Uses two deterrant methods: recording of predatory birds and an ultrasonic sound- Built-in motion sensor- Adjustable volume- Easy to install and adjust settings depending on your preference- Ideal for farms, yards, orchards, gardens and public buildings where birds tend to flock- Powered by 3 D batteries- Detection Distance: 8 yards- Detection Angle: 110 degree