Door Alarms When Opened,Sanjie Window Alarm Magnet Sensor - 4 Pack,125dB Loud,Volume Control,2-in-1 Alarm & Chime for Kids Safety/Dementia Patients/Pool,Keep Your Home Security,Long Battery Life

Why it's a great deal

• Door Alarm When Opened: When the door opens, the door sensor alarm sounds instantly to alert you.Prevents kids or toddlers from sneaking out, and protects your home from intruders. Enjoy peace of mind with reliable security

• Easy Installation and Setup: Tear off the 3M tape on the back of the alarm sensor and firmly stick it to doors, windows, or other objects. Turn on the switch, select alarm or chime mode, and it's ready to use. Indoor installation is recommended

• Widely Applicable: No false alarm with this wireless door alarm/chime. The open alarm sensor installs easily on the sliding door, window, front door, patio door, cabinet, drawer, and more. Perfect for door alarm for kids safety, home security, and dementia patients, widely used in home, apartment, basement,office,pool, grocery store,dormitory,store, garage, RV, warehouse, hotel, and more

• Volume Control and 3 Modes: Door Alarms offer 3 modes to fit your needs: Mode 1: 125dB alarm (loud enough for the whole house); Mode 2: 100dB alarm (loud but gentle); Mode 3: 100dB chime (ding dong twice). When the door window alarm sensor is triggered in Mode 1 or 2, the alarm sounds continuously for 30 seconds until the door or window is closed

• Long Battery Life: The door alarm sensor is powered by three LR44 button batteries, lasting up to 12 months. When the door alarm battery is low, the indicator light flashes to alert you. No worries about rapid battery drain or unexpected power loss