Wireless door and window alarm with remote control. Produces 80 to 110dB adjustable volume with 4 levels. Features three selectable chime tones for door entry alert or security mode. Ultra low power consumption, battery lasts 1 to 2 years on a single set. Remote works up to 20 to 50 meters (open area). Includes remote control, main alarm unit, and magnetic sensor strip. Easy to mount on doors, windows, cabinets, or drawers. Ideal for home, office, or warehouse security.The set does not include batteries.