Amtek Critter Gitter - Animal Repeller with Alarm and Flashing Device Horn emits 120-decibel sound for approximately 5 seconds.A different sound is generated each time unit is tripped Two High-Intensity Lights (simulating eyes) flash Red during alarm cycle Composite Lens detects body heat and motion within a 90 Degree radius and up to 40 Feet away 8 Detection Zones Horizontally, and 4 Detection Zones Down, to include area directly below the unit Self-powered by standard 9V battery (Included)