Features: Widely use for doors, screen doors, windows, cabinets, etc Energy saving and environmental protection Adhesive tape on both the stick, easy to install Super loud alarm of 105dB, scare thief away Powered by 3 pieces of 1.5V LR44 button batteries. (Batteries are included in the package.) Magnetic sensor, door and window motion detector. Size of main unit: 54 x 35 x 18 mm Size of stick: 50 x 14 x 12 mm Color: White Package included: 1 set x Wireless Door Window entry alarm