Secures Your Home From Intruders! Piercing Alarm or Pleasant Chime."Feel Safe and Secure anywhere. Infrared Motion Sensor Technology. No installation required. Panic button activates the alarm. Includes 1 mountable alarm unit and 2 remote control units."Great for doors, sheds, garages and more. 4.75 x 3.75 x 1.75 and includes retail packaging