Door Window Alarm for kids safety. Magnetic Security Sensor for home pool office apartment hotel garage. Are you worried about following things: Your children sneak out without your permission? Sometimes forget to close a refrige door, medicine chest or drawer? There is no alarm when a thief is entering the door? Missing a visitor or customer? How did you do? This door window alarm can help you to solve all problems. It has 5 alarm modes: Alarm 30s: As Anti-theft mode.It will continue to alarm for 30s as soon as a door/window is opened. DingDong: As Doorbell. It sound ''dingdong'' when a door is opened.Prompt you someone is visiting. Separating Alarm/Close stop alarm: It alarms when Magnetic Sensors  is separated,and stop alarm when sensors is closed.If you need to stop alarm when a door or window is closed,you can choose this mode. DIDI Intermittent alarm: This alarm mode can be use as refrigerator, medicine box,safe door alarm,drawer alarm.Remind you that you may forget to close some important doors. Delayed Mode: Open the door/window for 15s,the alarm will be actived,alarm sound lasts for 30s. 3 Level Volume for Adjustment : 100-125dB,Just Press SET button to adjust it. Double-sides magnetic sensor alarm: More places can use it than single side sensor. Easy to install, just paste the alarm with double-sided tape(included) on the area you need to instal. Technical Parameters: Working humidity: <90% Working temperature: -10? to 50 ? Lound enough: 130dB Operating Voltage: 3 * LR44 battery Trigger distance: 15 mm Package Magnetic Sensor Alarm * 3 LR44 * 9 Instruction Manual *1