door alarm will alarm and flash light when the door is opened, 3 modes can be set(flashing light only-alarm only-flashing light when alarming)
【600Ft Working Range】 600Ft long distance working range makes the door chime suitable for home/office/store/business.The battery of the door sensor will affect the working range, please replace it regularly.
【39 Chimes 4 Volume Level】This window alarm sensors has 39 chimes and 4 volume levels (0-30-70-110dB),is a great choice as door alarms for your home.
【32 Sensors Expandable】Each door alarm sensor or wireless doorbell chime can be expanded to 32.Installing more window alarms is essential for home security.
【Easy to install】The installation is very simple, we have prepared installation accessories and manuals for each door and window alarm, please install and use after reading the manual.
