IQ America Motion Activated Entrance Alert Wireless Door Chime Wireless commercial entrance alert with motion sensor. Sensor chimes when motion is detected in entryway. Signal passes through walls, floors, and doors. No wiring required. Plug doorbell receiver into a 120 volt outlet. PIR sensor uses 3 AA batteries, not included. Sensor is rated for indoor or outdoor use. Ideal for use in entryways or as a driveway alert. Features volume control to adjust loudness and includes hardware. Receiver has 3 selectable chimes including 1-note, 2-note, and 8-note Westminster. 2 year warranty. 2.75 inches wide x 5 inches high x 1.5 inches deep. Weighs 0.7 pounds. Style Plug-In/Battery Operated, Range 150 Ft., Batteries Required 3 AA Alkaline, Color Off-White, Pkg Qty 1, Package Type Clamshell